Protein Modification Ontology (MOD)

Name: Protein Modification Ontology (MOD)
Published: 2026-11-13T13:50:45.374984Z

Selected English labels and exact synonyms from the Protein Modification Ontology (MOD), retrieved 2026-11-07, with source identifiers and spelling preserved. Licensed CC BY 4.0; full attribution is listed under Sources. Under semantic review; not endorsed by the ontology's maintainers.

Curator: Oliver Bennett

Languages shown reflect this page; source translations may cover only some concepts.

English
3x(2)H residue methyl esterUnrated ctermpeptrideuteromethylUnrated
2-acetylamino-5-amino-5-oxopentanoic acidUnrated 2-acetylamino-5-pentanediamic acidUnrated 2-acetylazanyl-5-azanyl-5-oxopentanoic acidUnrated (2S)-2-acetamido-5-pentanediamic acidUnrated acetylglutamineUnrated AcGlnUnrated N-acetylated L-glutamineUnrated N-acetyl-L-glutamineUnrated
bis-L-cysteinyl L-N3'-histidino L-serinyl tetrairon tetrasulfideUnrated METAL Iron-sulfur (4Fe-4S)Unrated METAL Iron-sulfur (4Fe-4S); via pros nitrogenUnrated tetra-mu3-sulfidobis(S-cysteinyliron)(N3'-histidinoiron)(O3-serinyliron)Unrated
3-[(2,6-dimethylpiperidin-1-yl)acetyl]amino)propanoylUnrated TMT6plex-130 reporter+balance reagent acylated N-terminalUnrated
(13)C isotope tagged reagentUnrated
S-ethylcysteine (Ser)Unrated
diisopropylphosphoserineUnrated
L-leucine removalUnrated
(2Z)-2-amino-3-(4-hydroxyphenyl)prop-2-enoic acidUnrated amino-(para-hydroxybenzylidenyl)acetic acidUnrated cis-dehydrotyrosineUnrated green fluorescent protein chromophoreUnrated MOD_RES (Z)-2,3-didehydrotyrosineUnrated para-hydroxybenzylidene-imidazolidinone chromophoreUnrated red fluorescent protein chromophoreUnrated (Z)-2,3-didehydrogenated tyrosineUnrated (Z)-2,3-didehydrotyrosineUnrated Z-dHTyrUnrated
2-[(1R)-1-amino-2-sulfanylethyl]-5-methyl-1,3-oxazole-4-carboxylic acidUnrated 2-[(1R)-1-azanyl-2-sulfanylethyl]-5-methyl-1,3-oxazole-4-carboxylic acidUnrated CROSSLNK 5-methyloxazole-4-carboxylic acid (Cys-Thr)Unrated L-cysteine 5-methyloxazole-4-carboxylic acidUnrated
HMPUnrated hydroxymethylphenyl linkerUnrated
2,4-bis[1-(S-cysteinyl)ethyl]protoporphyrin IXUnrated (7,12-bis[(1S)-1-([(2R)-2-amino-2-carboxyethyl]sulfanyl)ethyl]-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-bis[2-carboxyethyl]-N21,N22,N23,N24)-ferrateUnrated BINDING Heme (covalent)Unrated biscysteinyl hemeUnrated heme-bis-L-cysteineUnrated HemeCys2Unrated
18-ethenyl-3-[1-((2-amino-2-carboxy)ethylsulfanyl)ethyl]-1,2,3,19,22,24-hexahydro-2,7,13,17-tetramethyl-1,19-dioxo-21H-biline-8,12-dipropanoic acidUnrated (2R,3R)-3-[(1R)-1-(((2R)-2-amino-2-carboxy)ethylsulfanyl)ethyl]-8,12-bis(2-carboxyethyl)-18-ethyl-2,7,13,17-tetramethyl-1,2,3,19,21,22,24-heptahydrobilin-1,19(21H,22H,24H)-dioneUnrated BINDING Phytochromobilin chromophore (covalent; via 1 link)Unrated phytochrome chromophoreUnrated phytochromobilin cysteine adductUnrated S-phytochromobilin-L-cysteineUnrated
(2S)-2-amino-6-[(aminoacetyl)amino]hexanoic acidUnrated CROSSLNK Glycyl lysine isopeptide (Gly-Lys) (interchain with K-...)Unrated CROSSLNK Glycyl lysine isopeptide (Lys-Gly) (interchain with G-...)Unrated N6-glycyl-L-lysineUnrated N6-(glycyl)-L-lysineUnrated N6-glycyllysineUnrated XLNK-N6Lys-1GlyUnrated
Ac2SerUnrated diacetylated L-serineUnrated
chlorobenzylUnrated ClBzlUnrated
2-(glucuronoylamino)ethanoic acidUnrated MOD_RES N-D-glucuronoyl glycineUnrated N-D-glucuronoyl-glycineUnrated N-D-glucuronoylglycineUnrated N-D-glucuronyl-glycineUnrated NGlcAGlyUnrated ntermpepglucuronylgUnrated
(2S,3R)-2-amino-3-(hexadecanoyloxy)butanamideUnrated O-palmitoyl-L-threonine amideUnrated OPamThrNUnrated
palmityl reporter fragmentUnrated Pam+Unrated
monosodium L-glutamateUnrated MSGUnrated Na1GluUnrated
histidine 4-hydroxynonenal adductUnrated
(2R)-2-amino-3-([(2R)-2-([(4S)-4-amino-4-carboxybutanoyl]amino)-2-([2-([3-([4-aminobutyl]amino)propyl]carbamoyl)methyl]carbamoyl)ethyl]disulfanyl)propanoic acidUnrated cysteine glutathionylspermidine disulfideUnrated L-gamma-glutamyl-[S-(L-cystein-S-yl)]-L-cysteinyl-N-{3-[(4-aminobutyl)amino]propyl}glycinamideUnrated S-(spermidinoglutathion-S-yl)-L-cysteineUnrated
(4-methylpiperazin-1-yl)acetylUnrated iTRAQ8plex-119 reporter+balance reagent acylated N-terminalUnrated
(4-methylpiperazin-1-yl)acetylUnrated iTRAQ4plex-117 reporter+balance reagent O3-acylated serineUnrated
ModDAsnUnrated modified D-asparagine residueUnrated
2,3-trans-3,4-cis-3,4-dihydroxy-L-prolineUnrated 2-alpha-3-beta-4-beta-3,4-dihydroxyprolineUnrated (2S,3R,4S)-3,4-dihydroxyprolineUnrated (2S,3R,4S)-3,4-dihydroxypyrrolidine-2-carboxylic acidUnrated 3,4-dihydroxylated L-prolineUnrated 3,4-Dihydroxylation (of Proline)Unrated 34Hy2ProUnrated MOD_RES (3R,4S)-3,4-dihydroxyprolineUnrated trans-2,3-cis-3,4-dihydroxy-L-prolineUnrated
L-serine microcin E492 siderophore esterUnrated MOD_RES Serine microcin E492 siderophore esterUnrated N-[5-(6-O-seryl-beta-glucosyl)-2,3-dihydroxybenzoyl]-O-[N-(2,3-dihydroxybenzoyl)-O-[N-(2,3-dihydroxybenzoyl)seryl]seryl]serineUnrated
2-([(2R)-2-amino-2-carboxyethyl]sulfanyl)-2-(phosphonooxy)propanoic acidUnrated 2-([(2R)-2-azanyl-2-carboxyethyl]sulfanyl)-2-(phosphonooxy)propanoic acidUnrated (2R)-2-amino-3-[1-carboxy-1-(phosphonooxy)ethyl]sulfanylpropanoic acidUnrated 2-(S-L-cysteinyl)pyruvic acid O-phosphothioketalUnrated cysteinyl pyruvate O-phosphothioketalUnrated MOD_RES 2-(S-cysteinyl)pyruvic acid O-phosphothioketalUnrated phosphoenolpyruvate cysteine adductUnrated phospholactoyl cysteine adductUnrated S-[1-carboxy-1-(phosphonooxy)ethyl]cysteineUnrated SPEPCysUnrated
2-piperidinecarboxylic acidUnrated PipUnrated
2-amino-3-(hexadecanoylthio)propanoic acidUnrated (2R)-2-amino-3-(hexadecanoylsulfanyl)propanoic acidUnrated ACT_SITE S-palmitoyl cysteine intermediateUnrated cysteine hexadecanoate thioesterUnrated cysteine palmitate thioesterUnrated LIPID S-palmitoyl cysteineUnrated S-hexadecanoylated L-cysteineUnrated S-palmitoylated L-cysteineUnrated S-palmitoyl-L-cysteineUnrated S-palmityl CystenylUnrated SPamCysUnrated
2-(3-methylbutanoyl)-5-hydroxyoxazole-4-carbothionic acidUnrated (4Z)-4-[hydroxy(sulfanyl)methylidene]-2-(3-methylbutanoyl)-1,3-oxazol-5(4H)-one [tautomer]Unrated 5-hydroxy-2-(3-methylbutanoyl)-1,3-oxazole-4-carbothioic O-acidUnrated MOD_RES 2-(3-methylbutanoyl)-5-hydroxyoxazole-4-carbothionic acid (Leu-Cys)Unrated
carbon oxygenated residueUnrated COxyResUnrated
metal or metal cluster coordinated L-alanine residueUnrated
1-amino-4-{[3-(ethenylsulfonyl)phenyl]amino}-9,10-dioxo-9,10-dihydroanthracene-2-sulfonic acidUnrated 1-amino-9,10-dioxo-4-{[3-(vinylsulfonyl)phenyl]amino}-9,10-dihydroanthracene-2-sulfonic acidUnrated Uniblue AUnrated Uniblue A derivatized residueUnrated UniblueAResUnrated
(2R)-2-amino-3-([(2E)-3-(4-hydroxyphenyl)prop-2-enoyl]sulfanyl)propanoic acidUnrated cinnamate cysteine thioesterUnrated MOD_RES S-(4-hydroxycinnamyl)cysteineUnrated S-4-hydroxycinnamyl-L-cysteineUnrated S-para-coumaryl-L-cysteineUnrated
alpha-amino-beta-methylbutyric acidUnrated alpha-aminoisovaleric acidUnrated D-ValUnrated D-valineUnrated MOD_RES D-valineUnrated (R)-2-amino-3-methylbutanoic acidUnrated
(4-methylpiperazin-1-yl)acetylUnrated iTRAQ8plex-113 reporter+balance reagent O3-acylated serineUnrated
2-aminopentanedioic acid 5-methyl esterUnrated (2S)-2-amino-5-methoxy-5-oxopentanoic acidUnrated 5-methyl esterified L-glutamic acidUnrated 5-methyl L-2-aminoglutarateUnrated 5-methyl L-glutamateUnrated (5)-methyl L-hydrogen glutamateUnrated glutamic acid 5-methyl esterUnrated glutamic acid gamma-methyl esterUnrated L-glutamic acid 5-methyl esterUnrated L-glutamic acid 5-methyl ester (Glu)Unrated meestereUnrated methyleUnrated MOD_RES Glutamate methyl ester (Glu)Unrated O5MeGluUnrated O-methyl GlutamylUnrated
(4-methylpiperazin-1-yl)acetylUnrated iTRAQ8plex-119 reporter+balance reagent O4'-acylated tyrosineUnrated
(4-methylpiperazin-1-yl)acetylUnrated iTRAQ8plex-117 reporter+balance reagent O3-acylated serineUnrated
2-(methylamino)-4-methyl-valeric acidUnrated MOD_RES N-methylleucineUnrated NMe1LeuUnrated N-methylated L-leucineUnrated N-methylleucineUnrated N-methyl-L-leucineUnrated (S)-2-methylamino-4-methylpentanoic acidUnrated
[5-(hydroxy[sulfanyl-kappaS]methylene)-3,5-dihydro-4H-imidazol-4-onato-kappaN1][4-(hydroxy[sulfanyl-kappaS]methylene)-1,3-oxazol-5(4H)-onato-kappaN]copperUnrated METAL copper [Cu-methanobactin SB2 complex]Unrated methanobactin SB2 copper complexUnrated
Aminoethyl Cysteinyl (AECys)Unrated S-(2-aminoethyl)cysteine (Ser)Unrated
(4-methylpiperazin-1-yl)acetylUnrated iTRAQ8plex-121 reporter+balance reagent N'-acylated histidineUnrated
2-[(1S,2S)-1-amino-2-methylbutyl]-1,3-oxazole-4-carboxylic acidUnrated 2-[(1S,2S)-1-azanyl-2-methylbutyl]-1,3-oxazole-4-carboxylic acidUnrated CROSSLNK Oxazole-4-carboxylic acid (Ile-Ser)Unrated L-isoleucine oxazole-4-carboxylic acidUnrated
alpha-aminocarbamoylated residueUnrated N2CbmResUnrated ntermcarbamylUnrated
(2R,9S)-lysinoalanineUnrated (2S)-2-amino-6-([(2R)-2-amino-2-carboxyethyl]amino)hexanoic acidUnrated alaninolysineUnrated CROSSLNK Lysinoalanine (Ser-Lys)Unrated LALUnrated L-lysinoalanineUnrated L-lysinoalanine (Lys-Ser)Unrated Lysinoalanine (from Cysteine)Unrated N6-(2-amino-2-carboxyethyl)-L-lysineUnrated N-epsilon-(2-amino-2-carboxyethyl)-L-lysineUnrated XLNK-N6Lys-3Dha(Ser)Unrated
(2R,9S)-lysinoalanineUnrated (2S)-2-amino-6-([(2R)-2-amino-2-carboxyethyl]amino)hexanoic acidUnrated alaninolysineUnrated LALUnrated L-lysinoalanineUnrated L-lysinoalanine (Lys)Unrated lysino-D-alanineUnrated MOD_RES Lysino-D-alanine (Lys)Unrated N6-(2-amino-2-carboxyethyl)-L-lysineUnrated N-epsilon-(2-amino-2-carboxyethyl)-L-lysineUnrated
bis(hydroxyphenylglyoxal) arginineUnrated
2xC(13),3x(2)H labeled N6-acetyl-L-lysineUnrated Acetate labeling reagent (K) (heavy form, +5amu)Unrated COFRADIC heavy acetyl 13C2 2H3Unrated
(2R)-2-amino-3-([(Z)-2-aminoethenyl]sulfanyl)propanoic acidUnrated (R,Z)-S-(2-aminovinyl)cysteineUnrated S-(2-aminovinyl)-L-cysteineUnrated
alpha-1-microglobulin-Ig alpha complex chromophoreUnrated BINDING Multimeric 3-hydroxykynurenine chromophore (covalent)Unrated
quaternary amine labeling reagent light form (N-term & K)Unrated
ACT_SITE S-methylcysteine intermediateUnrated L-3-(methylthio)alanineUnrated MOD_RES S-methylcysteineUnrated (R)-2-amino-3-(methylsulfanyl)propanoic acidUnrated SMeCysUnrated S-methylated L-cysteineUnrated S-methyl-L-cysteineUnrated
nitrated L-tryptophanUnrated nitrowUnrated
(4-methylpiperazin-1-yl)acetylUnrated iTRAQ8plex-114 reporter+balance reagent N6-acylated lysineUnrated
2-amino-3-hydroxypropanoic acid 3-sulfateUnrated (2S)-2-amino-3-(sulfooxy)propanoic acidUnrated MOD_RES SulfoserineUnrated O3-sulfonoserineUnrated O3-sulfoserineUnrated O-sulfo-L-serineUnrated serine sulfate esterUnrated
4-methylbenzylUnrated MebUnrated
Me1GlnUnrated methylqUnrated monomethylated L-glutamineUnrated
2-formamido-4-(methylsulfanyl)butanoic acidUnrated 2-formylamino-4-(methylthio)butanoic acidUnrated 2-formylazanyl-4-(methylsulfanyl)butanoic acidUnrated (2S)-2-formylamino-4-(methylsulfanyl)butanoic acidUnrated fMetUnrated MOD_RES N-formylmethionineUnrated N-formylated L-methionineUnrated N-formyl-L-methionineUnrated N-formyl-L-methionine residueUnrated nformylmetUnrated
2-amino-6-(tetradecanamido)hexanoic acidUnrated (2S)-2-amino-6-(tetradecanoylamino)hexanoic acidUnrated epsilon-myristoyllysineUnrated LIPID N6-myristoyl lysineUnrated myristoylationkUnrated N6-(1-oxotetradecyl)-L-lysineUnrated N6-(C14:0 aliphatic acyl)lysineUnrated N6-myristoylated L-lysineUnrated N6-myristoyl-L-lysineUnrated N6MyrLysUnrated N(zeta)-myristoyllysineUnrated
(2S)-2-amino-3-[7-hydroxy-2-(alpha-D-mannopyranosyl)-1H-indol-3-yl]propanoic acidUnrated 7'-hydroxy-2'-alpha-mannosyl-L-tryptophanUnrated CARBOHYD C-linked (Man) hydroxytryptophanUnrated
Hy1IleUnrated monohydroxylated isoleucineUnrated
4-methyl-1-methylidenepiperazin-1-iumUnrated iTRAQ4plex-115 reporter fragmentUnrated
CROSSLNK Cysteinyl-selenocysteine (Cys-Sec)Unrated CROSSLNK Cysteinyl-selenocysteine (Sec-Cys)Unrated L-cysteinyl-L-selenocysteineUnrated L-cysteinyl-L-selenocysteine (Cys-Sec)Unrated (R,R)-2-amino-3-[3-(2-aminopropanoic acid)sulfanyl]selanylpropanoic acidUnrated
O-phosphorylated residueUnrated OPhosResUnrated
metal or metal cluster coordinated L-arginine residueUnrated
(2S)-pyrrolidine-2-carboxamideUnrated amidated L-prolineUnrated L-proline amideUnrated MOD_RES Proline amideUnrated prolinamideUnrated ProNUnrated
2-azanyl-3-(1H-imidazol-4-yl)propanoic acidUnrated 2-azanyl-3-(1H-imidazol-5-yl)propanoic acid [tautomer]Unrated (2S)-2-amino-3-(1H-imidazol-4-yl)propanoic acidUnrated (2S)-2-amino-3-(1H-imidazol-5-yl)propanoic acid [tautomer]Unrated 4-(2-amino-2-carboxyethyl)imidazoleUnrated alpha-amino-beta-(4-imidazole)propionic acidUnrated glyoxaline-5-alanineUnrated HisUnrated L-histidineUnrated L-histidine residueUnrated
2-methylsulfonyl-3-((2S)-2-amino-2-carboxyethyl)-1H-indoleUnrated 2'-methylsulfonyl-L-tryptophanUnrated MOD_RES 2'-methylsulfonyltryptophanUnrated
1'-(phospho-5'-adenosine)-L-histidineUnrated (2S)-2-amino-3-[1-(5'-adenosine phosphono)imidazol-4-yl]propanoic acidUnrated ACT_SITE Tele-AMP-histidine intermediateUnrated L-histidine 5'-adenosine phosphoramidesterUnrated L-histidine monoanhydride with 5'-adenylic acidUnrated N1'-adenylylated histidineUnrated N(tau)-5'-adenylic-L-histidineUnrated tele-5'-adenylic-L-histidineUnrated
dimethylated L-arginineUnrated dimethylrUnrated NNMe2ArgUnrated
alpha-amino dimethylated residueUnrated N2Me2ResUnrated ntermpepdimethylUnrated
2-[1-amino-2-sulfanylethyl]-1-carboxymethyl-1-imidazolin-5-oneUnrated (2-[(1R)-1-amino-2-sulfanylethyl]-5-oxo-4,5-dihydro-1H-imidazol-1-yl)acetic acidUnrated 4-methylidene-imidazole-5-one (MIO) active siteUnrated CROSSLNK 5-imidazolinone (Cys-Gly)Unrated cysteinyl-5-imidazolinone glycineUnrated L-cysteine 5-imidazolinone glycineUnrated para-hydroxybenzylidene-imidazolidinone chromophoreUnrated XLNK-1Cys-NGly(Imidazole)Unrated
CROSSLNK Cysteinyl-selenocysteine (Cys-Sec)Unrated CROSSLNK Cysteinyl-selenocysteine (Sec-Cys)Unrated L-cysteinyl-L-selenocysteineUnrated L-cysteinyl-L-selenocysteine (Cys-Cys)Unrated (R,R)-2-amino-3-[3-(2-aminopropanoic acid)sulfanyl]selanylpropanoic acidUnrated
L-isoglutamyl tetraglutamic acidUnrated
IsoTagResUnrated isotope labeled residueUnrated SILACUnrated
oxidized lysine biotinylated with biotin-LC-hydrazide, reducedUnrated
(4-methylpiperazin-1-yl)acetylUnrated iTRAQ4plex reporter+balance reagent acylated N-terminalUnrated
2-((2-amino-2-carboxyethyl)thio)butanedioic acidUnrated 2-amino-3-(1,2-dicarboxyethylthio)propanoic acidUnrated (2R)-2-{[(2R)-2-amino-2-carboxyethyl]sulfanyl}butanedioic acidUnrated (2R)-2-amino-3-([(1R)-1,2-dicarboxyethyl]sulfanyl)propanoic acidUnrated MOD_RES S-(2-succinyl)cysteineUnrated S-(1,2-dicarboxyethyl)cysteineUnrated S-[(2R)-2-succinyl]-L-cysteineUnrated S-(2-succinyl)cysteineUnrated S-(2-succinyl)-L-cysteineUnrated
Bruker Daltonics SERVA-ICPL(TM) quantification chemistry, light formUnrated
ctermpephselactmUnrated homoserine lactoneUnrated
crosslinked L-asparagine residueUnrated XlnkAsnUnrated
Me1CysUnrated methylcUnrated monomethylated L-cysteineUnrated
(4,4,5,5-(2)H4)-L-lysineUnrated 4,4,5,5-tetradeuterolysineUnrated lys-2H4Unrated
multisulfide crosslinked residuesUnrated
AocUnrated t-amyloxycarbonylUnrated
aminoacetic acidUnrated aminoethanoic acidUnrated azanylethanoic acidUnrated GlyUnrated glycineUnrated glycine residueUnrated glycocollUnrated
1-carboxy-N,N,N-trimethylmethanazaniumUnrated 2-trimethylammonioacetateUnrated betaineUnrated carboxymethyl-trimethylazaniumUnrated carboxy-N,N,N-trimethylmethanaminiumUnrated glycine betaineUnrated MOD_RES N,N,N-trimethylglycineUnrated N2Me3+GlyUnrated N,N,N-trimethylglycineUnrated N,N,N-trimethylglycine cationUnrated N,N,N-trimethylglyciniumUnrated (trimethylammonio)ethanoic acidUnrated
Br1TyrUnrated monobrominated tyrosineUnrated
2-amino-1,4-butanedicarboxylic acidUnrated (2S)-2-aminohexanedioic acidUnrated L-2-aminoadipic acidUnrated L-alpha-aminoadipic acidUnrated LysoicUnrated Oxidation of lysine (to aminoadipic acid)Unrated
3-[(2,6-dimethylpiperidin-1-yl)acetyl]amino)propanoylUnrated TMT6plex-128 reporter+balance reagent O4'-acylated tyrosineUnrated
2,3-didehydrobutyrineUnrated (2Z)-2-aminobut-2-enoic acidUnrated 3-methyldehydroalanineUnrated alpha,beta-dehydroaminobutyric acidUnrated anhydrothreonineUnrated beta-elim-tUnrated dehydroUnrated Dehydroamino butyric acidUnrated dehydrobutyrine (Thr)Unrated DhbUnrated Dhb(Thr)Unrated methyl-dehydroalanineUnrated MOD_RES 2,3-didehydrobutyrineUnrated phospholosstUnrated (Z)-2-amino-2-butenoic acidUnrated (Z)-2-aminobutenoic acidUnrated (Z)-dehydrobutyrineUnrated
L-aspartic acid removalUnrated
N,N-dimethyl-L-proline (from L-prolinium)Unrated
glutamyl semialdehyde (Arg)Unrated Oxidation of arginine (to glutamic acid)Unrated
2-(1-iminoethyl)-1-carboxymethyl-1-imidazolin-5-oneUnrated [2-(1-iminoethyl)-5-oxo-4,5-dihydro-imidazol-1-yl]-acetic acidUnrated (2-ethanimidoyl-5-oxo-4,5-dihydro-1H-imidazol-1-yl)acetic acidUnrated 2-imino-alanine 5-imidazolinone glycineUnrated 2-imino-alanyl-5-imidazolinone glycineUnrated 2,N-didehydroalanyl-5-imidazolinone glycineUnrated alanyl-5-imidazolinone glycineUnrated para-hydroxybenzylidene-imidazolidinone chromophoreUnrated red fluorescent protein zRFP574 chromophoreUnrated
L-selenomethionineUnrated semetmUnrated Se(S)MetUnrated
5x(13)C,1x(15)N labeled L-valineUnrated
(2S,2'S)-3,3'-[iminobis(4-hydroxybenzene-3,1-diyl)]bis(2-aminopropanoic acid)Unrated 5'-(L-tyros-5'-yl)amino-L-tyrosineUnrated 5'-[(tyros-5'-yl)amino]tyrosineUnrated 5'-tyrosyl-5'-aminotyrosineUnrated bis(LTQ) linkageUnrated CROSSLNK 5'-tyrosyl-5'-aminotyrosine (Tyr-Tyr) (interchain)Unrated

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