en · de · es · fr · pt
handling-notes.peptides1004.com › Data › Hydrolysis Chemistry And Composition — Background and Details

Hydrolysis Chemistry And Composition — Background and Details

By Editorial Desk · published 2025-07-25 · last reviewed 2025-08-29 · Data

If you have been reading about Degree of hydrolysis and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.

Updated 2025-08-29. Numbers and descriptions here follow the published literature rather than marketing material.

Hydrolysis Chemistry And Composition

Molecular weight distribution is a central compositional feature, and hydrolysis shifts the population toward lower-mass peptides, often below ten kilodaltons in extensively treated products. Enzyme choice, reaction time, temperature, pH, and enzyme-to-substrate ratio influence the peptide profile. Ultrafiltration or diafiltration may remove enzymes, salts, and smaller molecules. Because peptide size affects solubility, taste, foaming, and digestibility, manufacturers specify molecular weight ranges. However, two hydrolysates with similar average molecular weight can differ in peptide sequence and functional behavior.

Bitterness often increases with hydrolysis because hydrophobic peptides are exposed. Processing strategies therefore include selecting enzymes that cleave at specific sites, using exopeptidases to remove terminal hydrophobic residues, or blending hydrolysates with other ingredients. Allergenicity is another consideration: extensive hydrolysis can reduce IgE-binding epitopes, but it does not guarantee absence of allergenic potential. Regulatory frameworks vary in how they classify hydrolyzed whey for infant formula or sports products. Claims about reduced allergenicity or faster absorption depend on the specific product and study design, and are not uniform across all hydrolysates.

Whey protein hydrolysate is made by cleaving peptide bonds in whey proteins. The starting material is usually whey protein concentrate or isolate obtained during cheese or casein production. Proteolytic enzymes, acid, or heat can drive hydrolysis, although commercial processes favor controlled enzymatic treatment. The degree of hydrolysis describes the proportion of peptide bonds broken and separates partial from extensive hydrolysates. The resulting powder contains short peptides, free amino acids, residual intact protein, minerals, lactose, and fat in proportions that depend on the starting whey and downstream filtration.

Composition and Production Background

Whey protein hydrolysate is a dairy ingredient made by treating whey protein concentrate or isolate with proteases that cleave peptide bonds. The resulting mixture contains shorter peptides and free amino acids than intact whey protein. Commercial products vary widely in average peptide length, residual intact protein, lactose, fat, and minerals. The term hydrolysate does not imply a single fixed composition, because enzyme choice, reaction time, pH, and temperature all shape the final peptide distribution. Products are often described by degree of hydrolysis, a percentage estimate of cleaved peptide bonds.

Production begins with pasteurized whey, which is concentrated and sometimes defatted or demineralized before hydrolysis. Food-grade proteases, such as trypsin, chymotrypsin, pepsin, or microbial enzymes, are added under controlled conditions. After a target degree of hydrolysis is reached, the enzymes are inactivated by heat or pH adjustment. The liquor is then clarified, concentrated, and dried, usually by spray drying. Ultrafiltration or diafiltration may remove residual enzymes, salts, or very small peptides, depending on the intended specification.

Whey-protein-hydrolysate at a glance

PropertyValueNotes
AppearanceOff-white to cream powderColor varies with starting whey and drying
SolubilityDispersible in waterSolubility depends on peptide size and pH
Typical protein content70–90% dry basisVaries by filtration and hydrolysis degree
Typical storage temperature15–25 °CKeep dry and away from heat
Common analytical methodSize-exclusion chromatographyUsed for molecular weight distribution

Background and Composition

Whey protein hydrolysate is a dairy ingredient produced when whey proteins are treated with proteolytic enzymes or, less commonly, acid or heat under controlled conditions. The treatment cleaves peptide bonds and yields shorter peptide chains than those found in intact whey protein. The starting material is usually sweet whey or acid whey from cheese manufacture, concentrated by membrane filtration before hydrolysis. The resulting ingredient retains many amino acids from the original protein but differs in molecular size, solubility, and taste profile.

The parent whey proteins include beta-lactoglobulin, alpha-lactalbumin, serum albumin, immunoglobulins, and glycomacropeptide, depending on the whey source. Hydrolysis does not remove these sequences; it fragments them into peptides of varying length. The peptide distribution depends on the enzyme specificity, reaction time, temperature, pH, and enzyme-to-substrate ratio. Because the mixture is heterogeneous, a single molecular weight cannot describe the product. Instead, laboratories report a distribution, often spanning from a few hundred to several thousand daltons.

Whey protein hydrolysate appears in foods and supplements where rapid digestion, low viscosity, or reduced intact-protein content is desired. It is distinct from whey protein isolate and concentrate, which contain largely intact proteins, though hydrolysates can be made from either. In infant formula, extensively hydrolyzed whey is used in some specialty products, while partially hydrolyzed forms appear in other formulations. Human health effects depend on the specific peptide mixture and are not uniform across all hydrolysates.

Related pages on this site

Composition And Production Basics

Whey protein hydrolysate is a dairy ingredient made by breaking peptide bonds in whey proteins. Enzymes such as proteases, or in some processes acid or heat, cleave the protein chains into shorter peptides and free amino acids. The starting material may be sweet whey, acid whey, whey protein concentrate, or whey protein isolate. Because raw materials and reaction conditions differ, the final mixture is not a single uniform substance. Its peptide profile, mineral content, and residual lactose depend on the source and the processing steps used.

Production typically begins with pasteurization and concentration of whey. A protease is added under controlled temperature and pH, and the reaction is stopped by heat or pH change when the target extent of cleavage is reached. Ultrafiltration or diafiltration may remove enzymes, salts, and small molecules. The liquid is then spray dried into a powder. Process parameters shape bitterness, solubility, and peptide size. Established control points include enzyme type, reaction time, and inactivation conditions. How these variables interact across large-scale batches remains an area of active process development.

Composition and Background

Compared with whey protein concentrate or isolate, hydrolysate has a smaller average peptide size and a higher proportion of low-molecular-weight fractions. This change can affect solubility, viscosity, osmolality, taste, and foam formation. Some hydrolysates are bitter because hydrophobic peptides are exposed during cleavage. The term hydrolysate does not indicate a guaranteed peptide profile; two products with the same reported hydrolysis value can differ in peptide sequence and residual intact protein. Commercial specifications usually state protein content, moisture, ash, fat, and microbiology, while peptide distribution may be reported as a range.

Whey protein hydrolysate appears in infant formula, sports nutrition, and clinical nutrition. In infant formula, extensively hydrolyzed products are used when a reduced allergenicity is desired, though not all hydrolysates are hypoallergenic. In sports products, the ingredient is marketed for rapid amino acid delivery, but the practical advantage over intact whey protein remains debated. Research often compares hydrolysate with isolate or concentrate for absorption kinetics, muscle protein synthesis, and gastrointestinal tolerance. Regulatory categories differ by country, and label terms such as partially hydrolyzed or extensively hydrolyzed are defined in some jurisdictions but not others.

Production and Composition Basics

Whey protein hydrolysate is a dairy-derived ingredient made by treating whey protein with enzymes or acid to break peptide bonds. The starting material is typically sweet whey or acid whey from cheese manufacture, which contains beta-lactoglobulin, alpha-lactalbumin, bovine serum albumin, and immunoglobulins. Hydrolysis shortens protein chains into peptides and free amino acids, changing solubility, viscosity, and taste. The extent of breakdown is described by degree of hydrolysis, a percentage of cleaved peptide bonds. This value influences functional and sensory properties but does not by itself define a specific molecular profile.

Commercial production usually begins with whey protein concentrate or isolate, not raw whey, to reduce fat and lactose. Food-grade proteases from bacterial or plant sources are added under controlled temperature and pH, then inactivated by heat or pH adjustment. The resulting liquid may be clarified, filtered, concentrated, and spray-dried into powder. Enzyme choice, reaction time, and pretreatment conditions create products with different peptide size distributions. Because these variables are proprietary and not standardized, two hydrolysates with the same degree of hydrolysis can differ in peptide sequences and mineral content.

Composition reflects both the original whey and the hydrolysis process. Products contain protein-derived peptides, variable ash, moisture, and residual lactose or fat depending on filtration. Some free amino acids increase during hydrolysis, and bitterness often rises with higher degrees of hydrolysis due to exposed hydrophobic residues. Mineral profiles vary with the whey source and any neutralization step. Allergenicity may be reduced in extensively hydrolyzed products, but the extent depends on residual intact protein and peptide size, and this remains a subject of ongoing study.

Supporting material

The "free" and "bound" lipids do not differ significantly in their fatty acid composition. In addition to lactobacillic acid with a share of 31%, palmitic acid (C16:0), stearic acid (C18:0) and cis-vaccenic acid (C18:1 cis-11) with a proportion of 37%, 2% and 20% respectively. The test results of the newly discovered fatty acid showed that it is a saturated fatty acid. It is stable towards oxidizing agents that would react with a double bond in the carbon chain. In the reaction with hydrogen bromide (HBr), however, an addition of HBr occurs in the molecule. Hydrogenation is also possible, resulting in several isomers fatty acids with the molecular formula C19H38O2, one of which has been identified as nonadecanoic acid. The other compound is a branched-chain fatty acid with a methyl group as a branch (methyloctadecanoic acid), although the scientists could not distinguish at the time whether one or more isomers of it were present. Based on the results of the chemical and physical (infrared spectroscopy and X-ray diffraction) methods for structure elucidation, a saturated fatty acid with a cyclopropane ring in the carbon chain was proposed as the structure.

== Epidemiology == Diabulimia is most common in women, and in people between 15 and 30 years old. Around 40% of men with type 1 diabetes may have skipped insulin injection at least once, and around 20% of women. Some studies have found that up to 60% of people with type 1 diabetes deliberately restrict insulin at some point. Many articles and studies further conclude that diabetic females have, on average, higher body mass index (BMI) than their nondiabetic counterparts. Girls and young adult women with higher BMIs are also shown to be more likely to have disordered eating behavior (DEB). Many authoritative articles show that preteen and teenage girls with type 1 diabetes have significantly higher rates of eating disorders of all types than do girls without diabetes.

=== PhD program === The Graduate Division of Biomedical Sciences hosts an "umbrella" PhD program that is not confined to a specific department. In 2023, the program had 39 matriculants. Students undertake three lab rotations before selecting a mentor. A concentration in clinical investigation is offered for both PhD and MD/PhD candidates. PhD students receive full tuition remission, a stipend, and subsidized housing.

Sources: en.wikipedia.org

Supporting material

Folgers is promoted with the slogan "The best part of waking up is Folgers in your cup!" It is well associated with a jingle featured in almost every advertisement since 1984, with lyrics by Susan Spiegel Solovay and Bill Vernick, and music by Leslie Pearl. Over the years it has been rearranged and performed by many famous musicians, such as Richie Havens, Randy Travis, Bonnie Tyler, Paul Stanley, Aretha Franklin, and Rockapella. From 1965 to 1986, Folgers was known for television ads involving "Mrs. Olson", a Swedish neighbor played by Virginia Christine who invariably recommended a cup of Folgers coffee for the characters in the commercial. Folgers promoted their instant coffee in the 1970s and early 1980s ads which took the viewer inside various 'high-end' restaurants while a voice-over (by Bryan Clark) whispered to the viewer that they've secretly switched the coffee used at the restaurant with Folgers, and watched the restaurants' patrons to see if they could tell whether or not they noticed the difference. One Folgers television ad from 1985, "Peter Comes Home For Christmas," became particularly associated with the Christmas holidays. A college student returns home, apparently on Christmas Day. His younger sister is the first one to greet Peter, helping him make the Folgers. The smell of freshly brewed coffee awakening his parents and alerting them to their son's arrival. The Cunningham & Walsh spot aired yearly until 1998, then in edited form in 2004 and 2005. In the mid-1980s Folgers became a NASCAR sponsor.

=== EC 2.3.1: Transferring groups other than amino-acyl groups === EC 2.3.1.1: amino-acid N-acetyltransferase EC 2.3.1.2: imidazole N-acetyltransferase EC 2.3.1.3: glucosamine N-acetyltransferase EC 2.3.1.4: glucosamine-phosphate N-acetyltransferase EC 2.3.1.5: arylamine N-acetyltransferase EC 2.3.1.6: choline O-acetyltransferase EC 2.3.1.7: carnitine O-acetyltransferase EC 2.3.1.8: phosphate acetyltransferase EC 2.3.1.9: acetyl-CoA C-acetyltransferase EC 2.3.1.10: hydrogen-sulfide S-acetyltransferase EC 2.3.1.11: thioethanolamine S-acetyltransferase EC 2.3.1.12: dihydrolipoyllysine-residue acetyltransferase EC 2.3.1.13: glycine N-acyltransferase EC 2.3.1.14: glutamine N-phenylacetyltransferase EC 2.3.1.15: glycerol-3-phosphate O-acyltransferase EC 2.3.1.16: acetyl-CoA C-acyltransferase EC 2.3.1.17: aspartate N-acetyltransferase EC 2.3.1.18: galactoside O-acetyltransferase EC 2.3.1.19: phosphate butyryltransferase EC 2.3.1.20: diacylglycerol O-acyltransferase EC 2.3.1.21: carnitine O-palmitoyltransferase EC 2.3.1.22: 2-acylglycerol O-acyltransferase EC 2.3.1.23: 1-acylglycerophosphocholine O-acyltransferase EC 2.3.1.24: sphingosine N-acyltransferase EC 2.3.1.25: plasmalogen synthase EC 2.3.1.26: sterol O-acyltransferase EC 2.3.1.27: cortisol O-acetyltransferase EC 2.3.1.28: chloramphenicol O-acetyltransferase EC 2.3.1.29: glycine C-acetyltransferase EC 2.3.1.30: serine O-acetyltransferase EC 2.3.1.31: homoserine O-acetyltransferase EC 2.3.1.32: lysine N-acetyltransferase EC 2.3.1.33: histidine N-acetyltransferase EC 2.3.1.34: D-tryptophan N-acetyltransferase EC 2.3.1.35: glutamate N-acetyltransferase EC 2.3.1.36: D-amino-acid N-acetyltransferase EC 2.3.1.37: 5-aminolevulinate synthase EC 2.3.1.38: [acyl-carrier-protein] S-acetyltransferase EC 2.3.1.39: [acyl-carrier-protein] S-malonyltransferase EC 2.3.1.40: acyl-[acyl-carrier-protein]—phospholipid O-acyltransferase EC 2.3.1.41: β-ketoacyl-[acyl-carrier-protein] synthase I EC 2.3.1.42: glycerone-phosphate O-acyltransferase EC 2.3.1.43: phosphatidylcholine—sterol O-acyltransferase EC 2.3.1.44: N-acetylneuraminate 4-O-acetyltransferase EC 2.3.1.45: N-acetylneuraminate 7-O(or 9-O)-acetyltransferase EC 2.3.1.46: homoserine O-succinyltransferase EC 2.3.1.47: 8-amino-7-oxononanoate synthase EC 2.3.1.48: histone acetyltransferase EC 2.3.1.49: deacetyl-(citrate-(pro-3S)-lyase) S-acetyltransferase EC 2.3.1.50: serine C-palmitoyltransferase EC 2.3.1.51: 1-acylglycerol-3-phosphate O-acyltransferase EC 2.3.1.52: 2-acylglycerol-3-phosphate O-acyltransferase EC 2.3.1.53: phenylalanine N-acetyltransferase EC 2.3.1.54: formate C-acetyltransferase EC 2.3.1.55: identical to EC 2.3.1.82 EC 2.3.1.56: aromatic-hydroxylamine O-acetyltransferase EC 2.3.1.57: diamine N-acetyltransferase EC 2.3.1.58: 2,3-diaminopropionate N-oxalyltransferase EC 2.3.1.59: gentamicin 2′-N-acetyltransferase EC 2.3.1.60: gentamicin 3′-N-acetyltransferase EC 2.3.1.61: dihydrolipoyllysine-residue succinyltransferase EC 2.3.1.62: 2-acylglycerophosphocholine O-acyltransferase EC 2.3.1.63: 1-alkylglycerophosphocholine O-acyltransferase EC 2.3.1.64: agmatine N4-coumaroyltransferase EC 2.3.1.65: bile acid-CoA:amino acid N-acyltransferase EC 2.3.1.66: leucine N-acetyltransferase EC 2.3.1.67: 1-alkylglycerophosphocholine O-acetyltransferase EC 2.3.1.68: glutamine N-acyltransferase EC 2.3.1.69: monoterpenol O-acetyltransferase EC 2.3.1.70: deleted EC 2.3.1.71: glycine N-benzoyltransferase EC 2.3.1.72: indoleacetylglucose—inositol O-acyltransferase EC 2.3.1.73: diacylglycerol—sterol O-acyltransferase EC 2.3.1.74: chalcone synthase EC 2.3.1.75: long-chain-alcohol O-fatty-acyltransferase EC 2.3.1.76: retinol O-fatty-acyltransferase EC 2.3.1.77: triacylglycerol—sterol O-acyltransferase EC 2.3.1.78: heparan-α-glucosaminide N-acetyltransferase EC 2.3.1.79: maltose O-acetyltransferase EC 2.3.1.80: cysteine-S-conjugate N-acetyltransferase EC 2.3.1.81: aminoglycoside 3-N-acetyltransferase EC 2.3.1.82: aminoglycoside 6′-N-acetyltransferase EC 2.3.1.83: phosphatidylcholine—dolichol O-acyltransferase EC 2.3.1.84: alcohol O-acetyltransferase EC 2.3.1.85: fatty-acid synthase system EC 2.3.1.86: fatty-acyl-CoA synthase system EC 2.3.1.87: aralkylamine N-acetyltransferase EC 2.3.1.88: Now covered by EC 2.3.1.254, EC 2.3.1.255, EC 2.3.1.256, EC 2.3.1.257, EC 2.3.1.258 and EC 2.3.1.259 EC 2.3.1.89: tetrahydrodipicolinate N-acetyltransferase EC 2.3.1.90: β-glucogallin O-galloyltransferase EC 2.3.1.91: sinapoylglucose—choline O-sinapoyltransferase EC 2.3.1.92: sinapoylglucose—malate O-sinapoyltransferase EC 2.3.1.93: 13-hydroxylupinine O-tigloyltransferase EC 2.3.1.94: 6-deoxyerythronolide-B synthase EC 2.3.1.95: trihydroxystilbene synthase EC 2.3.1.96: glycoprotein N-palmitoyltransferase EC 2.3.1.97: glycylpeptide N-tetradecanoyltransferase EC 2.3.1.98: chlorogenate—glucarate O-hydroxycinnamoyltransferase EC 2.3.1.99: quinate O-hydroxycinnamoyltransferase EC 2.3.1.100: [myelin-proteolipid] O-palmitoyltransferase EC 2.3.1.101: formylmethanofuran—tetrahydromethanopterin N-formyltransferase EC 2.3.1.102: N6-hydroxylysine O-acetyltransferase EC 2.3.1.103: sinapoylglucose—sinapoylglucose O-sinapoyltransferase EC 2.3.1.104: The activity is covered by EC 2.3.1.25 EC 2.3.1.105: alkylglycerophosphate 2-O-acetyltransferase EC 2.3.1.106: tartronate O-hydroxycinnamoyltransferase EC 2.3.1.107: deacetylvindoline O-acetyltransferase EC 2.3.1.108: α-tubulin N-acetyltransferase EC 2.3.1.109: arginine N-succinyltransferase EC 2.3.1.110: tyramine N-feruloyltransferase EC 2.3.1.111: mycocerosate synthase EC 2.3.1.112: D-tryptophan N-malonyltransferase EC 2.3.1.113: anthranilate N-malonyltransferase EC 2.3.1.114: 3,4-dichloroaniline N-malonyltransferase EC 2.3.1.115: isoflavone-7-O-β-glucoside 6′′-O-malonyltransferase EC 2.3.1.116: flavonol-3-O-β-glucoside O-malonyltransferase EC 2.3.1.117: 2,3,4,5-tetrahydropyridine-2,6-dicarboxylate N-succinyltransferase EC 2.3.1.118: N-hydroxyarylamine O-acetyltransferase EC 2.3.1.119: Now covered by EC 2.3.1.199, EC 1.1.1.330, EC 4.2.1.134 and EC 1.3.1.93 EC 2.3.1.120: The reaction is due to EC 2.3.1.74 EC 2.3.1.121: 1-alkenylglycerophosphoethanolamine O-acyltransferase EC 2.3.1.122: trehalose O-mycolyltransferase EC 2.3.1.123: dolichol O-acyltransferase EC 2.3.1.124: Already listed as EC 2.3.1.20 EC 2.3.1.125: 1-alkyl-2-acetylglycerol O-acyltransferase EC 2.3.1.126: isocitrate O-dihydroxycinnamoyltransferase EC 2.3.1.127: ornithine N-benzoyltransferase EC 2.3.1.128: now classified as EC 2.3.1.266 and EC 2.3.1.267 EC 2.3.1.129: acyl-[acyl-carrier-protein]—UDP-N-acetylglucosamine O-acyltransferase EC 2.3.1.130: galactarate O-hydroxycinnamoyltransferase EC 2.3.1.131: glucarate O-hydroxycinnamoyltransferase EC 2.3.1.132: glucarolactone O-hydroxycinnamoyltransferase EC 2.3.1.133: shikimate O-hydroxycinnamoyltransferase EC 2.3.1.134: galactolipid O-acyltransferase EC 2.3.1.135: phosphatidylcholine—retinol O-acyltransferase EC 2.3.1.136: polysialic-acid O-acetyltransferase EC 2.3.1.137: carnitine O-octanoyltransferase EC 2.3.1.138: putrescine N-hydroxycinnamoyltransferase EC 2.3.1.139: ecdysone O-acyltransferase EC 2.3.1.140: rosmarinate synthase EC 2.3.1.141: galactosylacylglycerol O-acyltransferase EC 2.3.1.142: glycoprotein O-fatty-acyltransferase EC 2.3.1.143: β-glucogallin—tetrakisgalloylglucose O-galloyltransferase EC 2.3.1.144: anthranilate N-benzoyltransferase EC 2.3.1.145: piperidine N-piperoyltransferase EC 2.3.1.146: pinosylvin synthase EC 2.3.1.147: glycerophospholipid arachidonoyl-transferase (CoA-independent) EC 2.3.1.148: glycerophospholipid acyltransferase (CoA-dependent) EC 2.3.1.149: platelet-activating factor acetyltransferase EC 2.3.1.150: salutaridinol 7-O-acetyltransferase EC 2.3.1.151: 2,3′,4,6-tetrahydroxybenzophenone synthase EC 2.3.1.152: alcohol O-cinnamoyltransferase EC 2.3.1.153: anthocyanin 5-(6′′′-hydroxycinnamoyltransferase) EC 2.3.1.154: Now EC 2.3.1.176 EC 2.3.1.155: acetyl-CoA C-myristoyltransferase EC 2.3.1.156: phloroisovalerophenone synthase EC 2.3.1.157: glucosamine-1-phosphate N-acetyltransferase EC 2.3.1.158: phospholipid:diacylglycerol acyltransferase EC 2.3.1.159: acridone synthase EC 2.3.1.160: vinorine synthase EC 2.3.1.161: lovastatin nonaketide synthase EC 2.3.1.162: taxadien-5α-ol O-acetyltransferase EC 2.3.1.163: 10-hydroxytaxane O-acetyltransferase EC 2.3.1.164: isopenicillin-N N-acyltransferase EC 2.3.1.165: 6-methylsalicylic acid synthase EC 2.3.1.166: 2α-hydroxytaxane 2-O-benzoyltransferase EC 2.3.1.167: 10-deacetylbaccatin III 10-O-acetyltransferase EC 2.3.1.168: dihydrolipoyllysine-residue (2-methylpropanoyl)transferase EC 2.3.1.169: CO-methylating acetyl-CoA synthase EC 2.3.1.170: 6′-deoxychalcone synthase EC 2.3.1.171: anthocyanin 6′′-O-malonyltransferase EC 2.3.1.172: anthocyanin 5-O-glucoside 6′′′-O-malonyltransferase EC 2.3.1.173: flavonol-3-O-triglucoside O-coumaroyltransferase EC 2.3.1.174: 3-oxoadipyl-CoA thiolase EC 2.3.1.175: deacetylcephalosporin-C acetyltransferase EC 2.3.1.176: propanoyl-CoA C-acyltransferase EC 2.3.1.177: 3,5-dihydroxybiphenyl synthase EC 2.3.1.178: diaminobutyrate acetyltransferase EC 2.3.1.179: β-ketoacyl-[acyl-carrier-protein] synthase II EC 2.3.1.180: β-ketoacyl-[acyl-carrier-protein] synthase III EC 2.3.1.181: lipoyl(octanoyl) transferase EC 2.3.1.182: Now covered by EC 2.3.3.21 EC 2.3.1.183: phosphinothricin acetyltransferase EC 2.3.1.184: acyl-homoserine-lactone synthase EC 2.3.1.185: tropine acyltransferase EC 2.3.1.186: pseudotropine acyltransferase EC 2.3.1.187: acetyl-S-ACP:malonate ACP transferase EC 2.3.1.188: ω-hydroxypalmitate O-feruloyl transferase EC 2.3.1.189: mycothiol synthase EC 2.3.1.190: acetoin dehydrogenase EC 2.3.1.191: UDP-3-O-(3-hydroxyacyl)glucosamine N-acyltransferase EC 2.3.1.192: glycine N-phenylacetyltransferase EC 2.3.1.193: tRNAMetcytidine acetyltransferase EC 2.3.1.194: acetoacetyl-CoA synthase EC 2.3.1.195: (Z)-3-hexen-1-ol acetyltransferase EC 2.3.1.196: benzyl alcohol O-benzoyltransferase EC 2.3.1.197: dTDP-3-amino-3,6-dideoxy-α-D-galactopyranose 3-N-acetyltransferase EC 2.3.1.198: glycerol-3-phosphate 2-O-acyltransferase EC 2.3.1.199: very-long-chain 3-oxoacyl-CoA synthase EC 2.3.1.200: lipoyl amidotransferase EC 2.3.1.201: UDP-2-acetamido-3-amino-2,3-dideoxy-glucuronate N-acetyltransferase EC 2.3.1.202: UDP-4-amino-4,6-dideoxy-N-acetyl-β-L-altrosamine N-acetyltransferase EC 2.3.1.203: UDP-N-acetylbacillosamine N-acetyltransferase EC 2.3.1.204: octanoyl-[GcvH]:protein N-octanoyltransferase EC 2.3.1.205: fumigaclavine B O-acetyltransferase EC 2.3.1.206: 3,5,7-trioxododecanoyl-CoA synthase EC 2.3.1.207: β-ketodecanoyl-[acyl-carrier-protein] synthase EC 2.3.1.208: 4-hydroxycoumarin synthase EC 2.3.1.209: dTDP-4-amino-4,6-dideoxy-D-glucose acyltransferase EC 2.3.1.210: dTDP-4-amino-4,6-dideoxy-D-galactose acyltransferase EC 2.3.1.211: bisdemethoxycurcumin synthase EC 2.3.1.212: benzalacetone synthase EC 2.3.1.213: cyanidin 3-O-(6-O-glucosyl-2-O-xylosylgalactoside) 6′′′-O-hydroxycinnamoyltransferase EC 2.3.1.214: pelargonidin 3-O-(6-caffeoylglucoside) 5-O-(6-O-malonylglucoside) 4′′′-malonyltransferase EC 2.3.1.215: anthocyanin 3-O-glucoside 6-O-hydroxycinnamoyltransferase EC 2.3.1.216: 5,7-dihydroxy-2-methylchromone synthase EC 2.3.1.217: curcumin synthase EC 2.3.1.218: phenylpropanoylacetyl-CoA synthase EC 2.3.1.219: demethoxycurcumin synthase EC 2.3.1.220: 2,4,6-trihydroxybenzophenone synthase EC 2.3.1.221: noranthrone synthase EC 2.3.1.222: phosphate propanoyltransferase EC 2.3.1.223: 3-oxo-5,6-didehydrosuberyl-CoA thiolase EC 2.3.1.224: acetyl-CoA-benzylalcohol acetyltransferase EC 2.3.1.225: protein S-acyltransferase EC 2.3.1.226: carboxymethylproline synthase EC 2.3.1.227: GDP-perosamine N-acetyltransferase EC 2.3.1.228: isovaleryl-homoserine lactone synthase EC 2.3.1.229: 4-coumaroyl-homoserine lactone synthase EC 2.3.1.230: 2-heptyl-4(1H)-quinolone synthase EC 2.3.1.231: tRNAPhe {7-[3-amino-3-(methoxycarbonyl)propyl]wyosine37 -N}-methoxycarbonyltransferase EC 2.3.1.232: methanol O-anthraniloyltransferase EC 2.3.1.233: 1,3,6,8-tetrahydroxynaphthalene synthase EC 2.3.1.234: N6-L-threonylcarbamoyladenine synthase EC 2.3.1.235: tetracenomycin F2 synthase EC 2.3.1.236: 5-methylnaphthoic acid synthase EC 2.3.1.237: neocarzinostatin naphthoate synthase EC 2.3.1.238: monacolin J acid methylbutanoate transferase EC 2.3.1.239: 10-deoxymethynolide synthase EC 2.3.1.240: narbonolide synthase EC 2.3.1.241: Kdo2-lipid IVA lauroyltransferase EC 2.3.1.242: Kdo2-lipid IVA palmitoleoyltransferase EC 2.3.1.243: lauroyl-Kdo2-lipid IVA myristoyltransferase EC 2.3.1.244: 2-methylbutanoate polyketide synthase EC 2.3.1.245: 3-hydroxy-5-phosphooxypentane-2,4-dione thiolase EC 2.3.1.246: 3,5-dihydroxyphenylacetyl-CoA synthase EC 2.3.1.247: 3-keto-5-aminohexanoate cleavage enzyme EC 2.3.1.248: spermidine disinapoyl transferase EC 2.3.1.249: spermidine dicoumaroyl transferase EC 2.3.1.250: [Wnt protein] O-palmitoleoyl transferase EC 2.3.1.251: lipid IVA palmitoyltransferase EC 2.3.1.252: mycolipanoate synthase EC 2.3.1.253: phloroglucinol synthase EC 2.3.1.254: N-terminal methionine Nα-acetyltransferase NatB EC 2.3.1.255: N-terminal amino-acid Nα-acetyltransferase NatA EC 2.3.1.256: N-terminal methionine Nα-acetyltransferase NatC EC 2.3.1.257: N-terminal L-serine Nα-acetyltransferase NatD EC 2.3.1.258: N-terminal methionine Nα-acetyltransferase NatE EC 2.3.1.259: N-terminal methionine Nα-acetyltransferase NatF EC 2.3.1.260: tetracycline polyketide synthase EC 2.3.1.261: (4-hydroxyphenyl)alkanoate synthase EC 2.3.1.262: anthraniloyl-CoA anthraniloyltransferase EC 2.3.1.263: 2-amino-4-oxopentanoate thiolase EC 2.3.1.264: β-lysine N6-acetyltransferase EC 2.3.1.265: phosphatidylinositol dimannoside acyltransferase EC 2.3.1.266: [ribosomal protein S18]-alanine N-acetyltransferase EC 2.3.1.267: [ribosomal protein S5]-alanine N-acetyltransferase EC 2.3.1.268: ethanol O-acetyltransferase EC 2.3.1.269: apolipoprotein N-acyltransferase EC 2.3.1.270: lyso-ornithine lipid O-acyltransferase EC 2.3.1.271: L-glutamate-5-semialdehyde N-acetyltransferase EC 2.3.1.272: 2-acetylphloroglucinol acetyltransferase EC 2.3.1.273: diglucosylglycerate octanoyltransferase EC 2.3.1.274: phosphate acyltransferase EC 2.3.1.275: acyl phosphate:glycerol-3-phosphate acyltransferase EC 2.3.1.276: galactosamine-1-phosphate N-acetyltransferase EC 2.3.1.277: 2-oxo-3-(phosphooxy)propyl 3-oxoalkanoate synthase EC 2.3.1.278: mycolipenoyl-CoA—2-(long-chain-fatty acyl)-trehalose mycolipenoyltransferase EC 2.3.1.279: long-chain-acyl-CoA—trehalose acyltransferase EC 2.3.1.280: (aminoalkyl)phosphonate N-acetyltransferase EC 2.3.1.281: 5-hydroxydodecatetraenal polyketide synthase EC 2.3.1.282: phenolphthiocerol/phthiocerol/phthiodiolone dimycocerosyl transferase EC 2.3.1.283: 2′-acyl-2-O-sulfo-trehalose (hydroxy)phthioceranyltransferase EC 2.3.1.284: 3′-(hydroxy)phthioceranyl-2′-palmitoyl(stearoyl)-2-O-sulfo-trehalose (hydroxy)phthioceranyltransferase EC 2.3.1.285: (13S,14R)-1,13-dihydroxy-N-methylcanadine 13-O-acetyltransferase EC 2.3.1.286: protein acetyllysine N-acetyltransferase EC 2.3.1.287: phthioceranic/hydroxyphthioceranic acid synthase EC 2.3.1.288: 2-O-sulfo trehalose long-chain-acyltransferase EC 2.3.1.289: aureothin polyketide synthase system EC 2.3.1.290: spectinabilin polyketide synthase system EC 2.3.1.291: sphingoid base N-palmitoyltransferase EC 2.3.1.292: (phenol)carboxyphthiodiolenone synthase EC 2.3.1.293: meromycolic acid 3-oxoacyl-(acyl carrier protein) synthase I EC 2.3.1.294: meromycolic acid 3-oxoacyl-(acyl carrier protein) synthase II EC 2.3.1.295: mycoketide-CoA synthase EC 2.3.1.296: ω-hydroxyceramide transacylase EC 2.3.1.297: very-long-chain ceramide synthase EC 2.3.1.298: ultra-long-chain ceramide synthase EC 2.3.1.299: sphingoid base N-stearoyltransferase EC 2.3.1.300: branched-chain β-ketoacyl-[acyl-carrier-protein] synthase EC 2.3.1.301: mycobacterial β-ketoacyl-[acyl carrier protein] synthase III EC 2.3.1.302: hydroxycinnamoyl-CoA:5-hydroxyanthranilate N-hydroxycinnamoyltransferase EC 2.3.1.303: α-L-Rha-(1→2)-α-D-Man-(1→2)-α-D-Man-(1→3)-α-D-Gal-PP-Und 2IV-O-acetyltransferase EC 2.3.1.304: poly[(S)-3-hydroxyalkanoate] polymerase

== Controversies and legal troubles == In June 2016, Bay Area bands Wax Idols and King Woman abruptly ended their tour with Pentagram, citing instances of harassment and unprofessional conduct. Hether Fortune of Wax Idols and Kristina Esfandiari of King Woman stated that they and their bandmates had been "treated really poorly & harassed in gross ways," leading them to withdraw from the tour. Pentagram's management labeled the situation as "unfounded and grossly opportunistic," claiming that after a few nights on tour, the bands "simply disappeared, posted negatively about us on social media, and then headed over to the show that was previously set up for them that very night." In 2017, Liebling was arrested and charged with first-degree assault and physical abuse/injury of a vulnerable adult, later revealed to be his, at the time, 87-year-old mother Diane Liebling. He entered into a plea agreement, resulting in him pleading guilty to the abuse/neglect charge while maintaining his innocence regarding the first-degree assault charge. In October 2017, Liebling was sentenced to eighteen months in the Montgomery County Detention Center and three years of probation upon release. During Liebling's incarceration, Pentagram continued their US tour and performed in Europe without him, with Victor Griffin taking over on vocals. Previously, Liebling had been charged once for violating a restraining order and multiple times for drug possession.

Sources: en.wikipedia.org

Supporting material

=== Financial system === Market capitalization of U.S. banks lost a combined $100 billion in two days and European banks lost $50 billion. SVB's losses highlighted the challenge that banks could face as interest rate increases reduced the market value of bonds that they purchased under low-rate policies. Some companies have sought safety with larger commercial banks, transferring their deposits out from regional banks similar to Silicon Valley Bank, raising concerns about further instability in the banking sector. Several banks, such as First Republic Bank and Western Alliance Bancorporation, issued press releases seeking to calm investors. Despite these concerns, banking experts believe that other banks will remain stable as SVB was overly specialized in providing banking to a risky sector of the economy, and financial regulations have strengthened since the 2008 financial crisis, which preceded the Great Recession. SVB had, in 2021, reached the threshold under the Dodd-Frank Act requiring it to submit a resolution plan ("living will") to the FDIC, which it did the following year. It had not participated in periodic stress testing under the act, as the threshold for that requirement had been raised in 2018 under EGRRCPA; SVB's chief executive was among those requesting the change. On March 12, 2023, Signature Bank was also closed, being taken into possession by the New York State Department of Financial Services. Following the bank failures, the Federal Reserve announced the creation of a Bank Term Funding Program to shore up liquidity for other at-risk banks.

Myofascial release (MFR, self-myofascial release) is an alternative medicine therapy that proponents claim to be useful for treating skeletal muscle immobility and pain by relaxing contracted muscles, improving blood and lymphatic circulation, and stimulating the stretch reflex in muscles. Fascia is a thin, tough, elastic type of connective tissue that wraps most structures within the human body, including muscle. Fascia supports and protects these structures. Osteopathic practitioners hold that this soft tissue can become restricted due to psychogenic disease, overuse, trauma, infectious agents, or inactivity, often resulting in pain, muscle tension, and corresponding diminished blood flow.

The aromaticity varies for PAHs. According to Clar's rule, the resonance structure of a PAH that has the largest number of disjoint aromatic pi sextets—i.e. benzene-like moieties—is the most important for the characterization of the properties of that PAH.

Sources: en.wikipedia.org

Frequently asked questions

What is the difference between whey protein hydrolysate and whey protein isolate?

Both derive from whey, but hydrolysate has been treated to break peptide bonds, producing shorter peptides. Isolate is filtered to high protein content with much of its original protein structure intact. The two differ in peptide size, taste, and functional properties.

Does hydrolysis remove lactose?

Hydrolysis targets proteins rather than lactose, so residual lactose depends on the starting whey and filtration steps. Lactose-free or low-lactose hydrolysates require additional processing.

Is whey protein hydrolysate always hypoallergenic?

No. Extensive hydrolysis can reduce some allergenic epitopes, but residual peptides may still bind IgE in sensitive individuals. Product-specific testing and clinical guidance determine suitability.

How does whey protein hydrolysate differ from whey protein isolate?

Whey protein isolate is largely intact protein with a high protein content, while hydrolysate has been enzymatically cleaved into shorter peptides. The difference is not simply protein concentration; it is the molecular size distribution. A hydrolysate may start from isolate or concentrate, so labels can describe both the source and the hydrolysis step.

Network