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(+)-catechin + 1/2 O2
?
-
-
-
?
(+)-catechin hydrate + 1/2 O2
?
(+/-)-catechin + O2
?
-
58.7% activity compared to L-DOPA
-
-
?
(-)-epicatechin + 1/2 O2
?
(1R,3R,4S,5R)-3-[[(2E)-3-(3,4-dihydroxyphenyl)prop-2-enoyl]oxy]-1,4,5-trihydroxycyclohexanecarboxylic acid + O2
(1R,3R,4S,5R)-3-[[(2E)-3-(3,4-dioxocyclohexa-1,5-dien-1-yl)prop-2-enoyl]oxy]-1,4,5-trihydroxycyclohexanecarboxylic acid + H2O
-
-
-
-
?
(1S,3R,4S,5R)-4-[[(2E)-3-(3,4-dihydroxyphenyl)prop-2-enoyl]oxy]-1,3,5-trihydroxycyclohexanecarboxylic acid + O2
(1S,3R,4S,5R)-4-[[(2E)-3-(3,4-dioxocyclohexa-1,5-dien-1-yl)prop-2-enoyl]oxy]-1,3,5-trihydroxycyclohexanecarboxylic acid + H2O
-
-
-
-
?
(R)-dopaxanthin + dehydroascorbic acid + O2
(R)-dopaxanthin quinone + L-ascorbic acid + H2O
(R)-tyrosine-betaxanthin + L-DOPA + O2
(R)-dopaxanthin + dopaquinone + H2O
-
i.e. (R)-portulacaxanthin II, the activity of the enzyme is not restricted to betaxanthins derived from (S)-amino acids
(R)-dopaxanthin is a pigment, quantitative product analysis
-
?
1,5-bis(4-hydroxyphenyl)-1,4-pentadiene-3-one + O2
?
-
-
-
-
?
2 hydroquinone + O2
2 quinone + 2 H2O
2,3-dimethylphenol + O2
?
-
11% relative activity compared to L-DOPA
-
-
?
2,4,5-trihydroxyphenethylamine + O2
?
-
-
-
-
?
2-caffeoylisocitric acid + O2
?
-
i.e., E-3-carboxy-2-(3-(3,4-dihydroxyphenyl)prop-2-enoyloxy)pentanedioic acid
-
-
?
2-caffeoylisocitric acid 6-methyl ester + O2
?
-
i.e, E-2-(3-(3,4-dihydroxyphenyl)prop-2-enoyloxy)-3-(methoxycarbonyl)pentanedioic acid
-
-
?
2-hydroxy-1-[[(2E)-3-(4-hydroxy-3-methoxyphenyl)prop-2-enoyl]oxy]propane-1,2,3-tricarboxylic acid + O2
3-C-carboxy-2-deoxy-4-O-[(2E)-3-(3-methoxy-4-oxocyclohexa-1,5-dien-1-yl)prop-2-enoyl]pentaric acid + H2O
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
2-O-caffeoylisocitric acid + O2
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
2-O-caffeoylthreonic acid + O2
?
-
i.e., E-2-(3-(3,4-dihydroxyphenyl)prop-2-enoyloxy)-3,4-dihydroxybutanoic acid
-
-
?
2-[[(2E)-3-(3,4-dihydroxyphenyl)prop-2-enoyl]oxy]-3,4-dihydroxybutanoic acid + O2
2-[[(2E)-3-(3,4-dioxocyclohexa-1,5-dien-1-yl)prop-2-enoyl]oxy]-3,4-dihydroxybutanoic acid + H2O
-
-
-
-
?
3,3',4',5,7-pentahydroxyflavone + 1/2 O2
?
-
quercetin
-
-
?
3,4,5-trihydroxy-L-phenylalanine + O2
?
3,4,5-trihydroxybenzoic acid + O2
?
3,4,6-trihydroxyphenylalanine + O2
?
-
-
-
-
?
3,4-dihydroxyanisol + 1/2 O2
anisol o-quinone + H2O
-
-
-
?
3,4-dihydroxybenzoic acid + 1/2 O2
(3,4-dioxocyclohexa-1,5-dien-1-yl)acetic acid + H2O
-
isoenzymes 1-3, 22%, 13%, and 13% of L-dopa activity respectively
-
?
3,4-dihydroxyhydrocinnamic acid + O2
?
-
100% activity
-
-
?
3,4-dihydroxymandelic acid + O2
?
-
9% of the activity with L-dopa
-
-
?
3,4-dihydroxyphenethylamine + O2
?
-
-
-
-
?
3,4-dihydroxyphenylacetic acid + 1/2 O2
(3,4-dioxocyclohexa-1,5-dien-1-yl)acetic acid + H2O
-
DHPAA
-
-
?
3,4-dihydroxyphenylacetic acid + O2
?
3,4-dihydroxyphenylalanine + 1/2 O2
dopaquinone + H2O
-
-
-
-
?
3,4-dihydroxyphenylalanine + O2
?
-
-
-
-
?
3,4-dihydroxyphenylalanine methyl ester + O2
?
-
-
-
-
?
3,4-dihydroxyphenylpropionic acid + 1/2 O2
3-(3,4-dioxocyclohexa-1,5-dien-1-yl)propanoic acid + H2O
-
DHPPA
-
-
?
3,4-dihydroxyphenylpropionic acid + O2
3-(3,4-dioxocyclohexa-1,5-dien-1-yl)propionic acid
-
-
-
?
3,4-dihydroxyphenylserine + O2
?
-
-
-
-
?
3-(3,4-dihydroxyphenyl) propionic acid + 1/2 O2
3-(3,4-dihydroxyphenyl)propionic acid + H2O
-
-
-
?
3-(3,4-dihydroxyphenyl)-2-methylalanine + O2
?
-
-
-
-
?
3-(4-hydroxyphenyl)propionic acid + 1/2 O2
3-(3,4-dihydroxyphenyl)propionic acid + H2O
-
-
-
?
3-aminophenol + O2
?
-
3.9% activity compared to L-DOPA
-
-
?
3-chlorophenol + O2
4-chloro-1,2-quinone + H2O
-
20% of 3-chlorophenol is oxidized after 2 h by tyrosinase
4-chloro-1,2-quinone subsequently undergoes a nucleophilic substitution reaction at the chlorine atom by excess phenol to give the corresponding phenol-quinone adduct 4-(3-chlorophenoxy)cyclohexa-3,5-diene-1,2-dione
-
?
3-fluorophenol + O2
?
-
-
-
-
?
3-hydroxyanthranilic acid + O2
cinnabarinic acid + H2O
-
-
-
?
3-hydroxybenzyl alcohol + O2
?
-
-
-
-
?
3-hydroxyphloridzin + O2
?
-
-
-
-
?
3-methoxyphenol + O2
?
-
-
-
-
?
3-methylcatechol + O2
3-methyl-o-benzoquinone + H2O
-
-
-
?
3-[2-(3,4-dihydroxyphenyl)ethylaminocarbonyl]-3-methyl-1-(4-acetylphenyl)triazene + O2
(2E)-3-(4-acetylphenyl)-N-[2-(3,4-dioxocyclohexa-1,5-dien-1-yl)ethyl]-1-methyltriaz-2-ene-1-carboxamide + H2O
-
-
-
-
?
3-[2-(3,4-dihydroxyphenyl)ethylaminocarbonyl]-3-methyl-1-(4-ethoxycarbonylphenyl)triazene + O2
ethyl 4-[(1E)-3-[[2-(3,4-dioxocyclohexa-1,5-dien-1-yl)ethyl]carbamoyl]-3-methyltriaz-1-en-1-yl]benzoate + H2O
-
-
-
-
?
3-[2-(3,4-dihydroxyphenyl)ethylaminocarbonyl]-3-methyl-1-(4-tolyl)triazene + O2
(2E)-N-[2-(3,4-dioxocyclohexa-1,5-dien-1-yl)ethyl]-1-methyl-3-(4-methylphenyl)triaz-2-ene-1-carboxamide + H2O
-
-
-
-
?
3-[2-(4-hydroxyphenyl)ethylaminocarbonyl]-3-methyl-1-(4-acetylphenyl)triazene + O2
(2E)-3-(4-acetylphenyl)-1-methyl-N-[2-(4-oxocyclohexa-1,5-dien-1-yl)ethyl]triaz-2-ene-1-carboxamide + H2O
-
-
-
-
?
3-[2-(4-hydroxyphenyl)ethylaminocarbonyl]-3-methyl-1-(4-cyanophenyl)triazene + O2
(2E)-3-(4-cyanophenyl)-1-methyl-N-[2-(4-oxocyclohexa-1,5-dien-1-yl)ethyl]triaz-2-ene-1-carboxamide + H2O
-
-
-
-
?
3-[2-(4-hydroxyphenyl)ethylaminocarbonyl]-3-methyl-1-(4-ethoxycarbonylphenyl)triazene + O2
ethyl 4-[(1E)-3-methyl-3-[[2-(4-oxocyclohexa-1,5-dien-1-yl)ethyl]carbamoyl]triaz-1-en-1-yl]benzoate + H2O
-
-
-
-
?
3-[2-(4-hydroxyphenyl)ethylaminocarbonyl]-3-methyl-1-(4-tolyl)triazene + O2
(2E)-1-methyl-3-(4-methylphenyl)-N-[2-(4-oxocyclohexa-1,5-dien-1-yl)ethyl]triaz-2-ene-1-carboxamide + H2O
-
-
-
-
?
4-bromophenol + O2
?
-
-
-
-
?
4-chlorocatechol + 1/2 O2
4-chlorocyclohexa-3,5-diene-1,2-dione + H2O
-
-
-
-
?
4-chlorophenol + O2
4-chloro-1,2-quinone + H2O
4-coumaric acid + O2
?
-
-
-
-
?
4-ethylcatechol + 1/2 O2
4-ethylcyclohexa-3,5-diene-1,2-dione + H2O
-
-
-
-
?
4-hydroxyanisol + 1/2 O2
3,4-dihydoxyanisol + H2O
-
-
-
?
4-hydroxyanisole + O2
3,4-dihydoxyanisol + H2O
-
-
-
-
?
4-hydroxybenzaldehyde + 1/2 O2
3,4-dihydroxybenzaldehyde + H2O
-
-
-
?
4-hydroxybenzaldehyde + O2
?
-
-
-
-
?
4-hydroxybenzoic acid + O2 + AH2
3,4-dihydroxybenzoic acid + H2O + A
4-hydroxybenzyl alcohol + O2
?
-
-
-
-
?
4-hydroxybenzyl alcohol + O2 + AH2
3,4-dihydroxybenzyl alcohol + H2O + A
-
-
-
?
4-hydroxyphenyl acetic acid + O2
?
4-hydroxyphenyl propionic acid + O2
?
4-hydroxyphenylpropionic acid + O2
?
4-iodophenol + O2
?
-
-
-
-
?
4-methyl catechol + O2
4-methyl-o-benzoquinone + H2O
-
5% of the activity with L-dopa
-
-
?
4-methyl-catechol + O2
?
-
-
-
-
?
4-methylbenzene-1,2-diol + O2
?
-
-
-
-
?
4-methylcatechol + 1/2 O2
4-methyl-1,2-benzoquinone + H2O
4-methylcatechol + O2
4-methyl-1,2-benzoquinone + H2O
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
4-methylcatechol + O2
?
-
90% activity compared to 3,4-dihydroxyhydrocinnamic acid
-
-
?
4-Methylphenol + O2
?
-
-
-
-
?
4-nitrocatechol + 1/2 O2
4-nitrocyclohexa-3,5-diene-1,2-dione + H2O
-
-
-
-
?
4-nitrocatechol + O2
?
-
-
-
-
?
4-t-butylphenol + O2 + AH2
4-t-butyl 1,2-benzoquinone + H2O + A
-
-
-
?
4-tert-butylcatechol + 1/2 O2
4-(tert-butyl)benzo-1,2-quinone + H2O
4-tert-butylcatechol + 1/2 O2
4-tert-butylcyclohexa-3,5-diene-1,2-dione + H2O
-
-
-
-
?
4-tert-butylphenol + O2
4-tert-butyl 1,2-benzoquinone + H2O
-
-
-
?
4-tert-butylphenol + O2
?
-
-
-
-
?
4-tyrosol + O2
?
-
-
-
-
?
4-[(4-methylphenyl)azo]-1,2-benzendiol + 1/2 O2
4-[(E)-(4-methylphenyl)diazenyl]cyclohexa-3,5-diene-1,2-dione + H2O
4-[(4-methylphenyl)azo]-phenol + O2 + AH2
4-[(4-methylbenzo)azo]-1,2-benzendiol + H2O + A
5,6-dihydroxyindole + 1/2 O2
1H-indole-5,6-dione + H2O
-
-
-
-
?
adrenaline bitartrate + O2
?
-
-
-
-
?
alpha-methyl-DL-tyrosine + O2 + AH2
N-methyl-DL-dopa + H2O + A
alpha-methyl-dopa + O2
alpha-methyldopaquinone + H2O
-
-
-
?
alpha-methyl-L-tyrosine + O2 + AH2
N-methyl-L-dopa + H2O + A
-
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
caffeic acid + O2
caffeoyl quinone + H2O
catechol + 1/2 O2
1,2 benzoquinone + H2O
-
-
-
-
?
catechol + 1/2 O2
1,2-benzoquinone + H2O
catechol + 1/2 O2
o-benzoquinone + H2O
-
PPO from butter lettuce shows a higher affinity to 4-methylcatechol than to catechol
-
-
?
catechol + O2
1,2-benzoquinone + H2O
chlorogenic acid + 1/2 O2
chlorogenoquinone + H2O
chlorogenic acid + O2
chlorogenoquinone + H2O
D-dopa + 1/2 O2
D-dopaquinone + H2O
D-DOPA + O2
D-dopaquinone + H2O
D-Tyr + O2
D-dopa + H2O
-
-
-
?
D-tyrosine + L-dopa + O2
D-dopa + dopaquinone + H2O
D-tyrosine + O2
D-dopa + H2O
D-tyrosine + O2
dopaquinone + H2O
-
-
-
?
D-tyrosine + O2 + AH2
D-dopa + H2O + A
D-tyrosine + O2 + AH2
L-3,4-dihydroxyphenylalanine + H2O + A
-
-
-
-
?
DL-2-methyltyrosine + O2
?
-
-
-
-
?
DL-dopa + 1/2 O2
DL-dopaquinone + H2O
DL-DOPA + O2
DL-dopaquinone + H2O
-
78% activity compared to L-DOPA
-
-
?
DL-DOPA + O2
dopaquinone + H2O
-
39% activity at 2.5 mM substrate concentration
-
-
?
DL-tyrosine + O2
DL-DOPA + H2O
-
20.6% activity compared to L-DOPA
-
-
?
DL-tyrosine + O2 + AH2
DL-dopa + H2O + A
dopa + 1/2 O2
dopaquinone + H2O
dopamine + 1/2 O2
dopamine quinone + H2O
dopamine + 1/2 O2
dopaminequinone + H2O
-
-
-
?
ellagic acid + O2
?
-
high affinity substrate
-
-
?
epicatechin gallate + O2
?
-
-
-
-
?
epigallocatechin gallate + O2
?
-
-
-
-
?
esculetin + 1/2 O2
2H-chromene-2,6,7-trione + H2O
-
demonstration, that esculetin is no inhibitor, but a substrate of mushroom polyphenol oxidase (PPO) and horseradish peroxidase (POD)
-
-
?
esculetin + O2
?
-
-
-
-
?
ferulic acid + O2 + AH2
(2E)-3-(3,4-dihydroxy-5-methoxyphenyl)prop-2-enoic acid + H2O + A
gallic acid + 1/2 O2
5-hydroxy-3,4-dioxocyclohexa-1,5-diene-1-carboxylic acid + H2O
-
-
-
-
?
gamma-L-glutaminyl-3,4-dihydroxybenzene + O2
gamma-L-glutaminyl-3,4-benzoquinone + H2O
-
-
-
?
gamma-L-glutaminyl-4-hydroxybenzene + O2 + AH2
gamma-L-glutaminyl-3,4-dihydroxybenzene + H2O + A
-
-
-
?
glycyl-glycyl-L-tyrosine + O2
?
-
3.4fold higher activity compared to Tyr
-
-
?
glycyl-L-tyrosine + O2
?
-
2.9fold higher activity compared to Tyr
-
-
?
hydroquinone monomethylether + O2
quinone monomethylether
-
-
-
?
L-3,4-dihydroxyphenylalanine + 1/2 O2
L-dopachrome + H2O
-
-
-
-
?
L-3,4-dihydroxyphenylalanine + 1/2 O2
L-dopaquinone + H2O
L-3-hydroxytyrosine + L-dopa + O2
?
L-adrenaline + O2
?
-
-
-
-
?
L-dopa + 1/2 O2
dopachrome + H2O
-
-
-
-
?
L-dopa + 1/2 O2
L-dopachrome + H2O
-
-
-
-
?
L-dopa + 1/2 O2
L-dopaquinone + H2O
L-DOPA + O2
dopaquinone + H2O
L-DOPA + O2
L-dopachrome + H2O
-
-
-
-
?
L-Dopa + O2
L-dopaquinone + H2O
L-Tyr + O2
L-Dopa + H2O
-
diphenolase activity
-
-
?
L-Tyr + O2 + AH2
L-dopa + H2O + A
L-tyrosine + H2O2
3,4-dihydroxy-L-phenylalanine
-
-
-
-
?
L-tyrosine + L-dopa + O2
L-dopa + dopaquinone + H2O
L-tyrosine + O2
dihydroxyphenylalanine quinone + H2O
-
-
-
-
?
L-tyrosine + O2
dopachrome + H2O
-
-
-
?
L-tyrosine + O2
dopaquinone + H2O
L-tyrosine + O2
L-DOPA + H2O
L-tyrosine + O2
L-dopaquinone + H2O
-
-
-
-
?
L-tyrosine + O2 + AH2
L-3,4-dihydroxyphenylalanine + H2O + A
L-tyrosine + O2 + AH2
L-dopa + H2O + A
L-tyrosine methyl ester + O2
?
L-tyrosine methyl ester + O2
L-DOPA methyl ester + H2O
-
-
-
?
L-tyrosine methyl ester + O2 + AH2
L-dopa methyl ester + H2O + A
-
-
-
-
?
methyl gallate + O2
methyl 5-hydroxy-3,4-dioxocyclohexa-1,5-diene-1-carboxylate + H2O
-
-
-
-
?
methylcatechol + O2
4-methyl-1,2-benzoquinone + H2O
-
-
-
-
?
monophenol + O2
o-diphenol + H2O
-
-
-
?
N-acetyl-3,4-dihydroxyphenethylamine + O2
?
-
-
-
-
?
N-acetyl-6-hydroxytryptophan + O2
?
N-acetyl-L-tyrosine + O2
N-acetyl-dopaquinone + H2O
-
-
-
?
N-acetyldopamine + 1/2 O2
N-acetyldopamine quinone + H2O
N-acetyldopamine quinone + O2
1,2-dehydro-N-acetyldopamine + H2O
-
enzyme has both o-diphenoloxidase and N-acetyldopamine quinone:N-acetyldopamine quinone methide isomerase activity
-
?
N-beta-alanyldopamine + 1/2 O2
N-beta-alanyldopamine quinone + H2O
-
-
-
?
N-formyl-L-tyrosine + O2
?
-
-
-
-
?
N-methyl-3,4-dihydroxyphenethylamine + O2
?
-
-
-
-
?
noradrenaline + O2
?
-
-
-
-
?
Norepinephrine + O2
?
-
-
-
-
?
o-diphenol + O2
o-quinone + H2O
o-methoxyphenol + O2 + AH2
1,2-dihydroxy-3-methoxybenzene + H2O + A
p-coumaric acid + O2
caffeic acid + H2O
p-coumaric acid + O2 + AH2
caffeic acid + H2O + A
p-cresol + O2
4-methyl-o-quinone + H2O
-
-
-
-
?
p-cresol + O2
4-methylpyrocatechol + H2O
p-cresol + O2
?
-
20% activity at 2.5 mM substrate concentration
-
-
?
p-cresol + O2 + AH2
4-methyl-o-quinone + H2O + A
-
-
-
?
p-cresol + O2 + AH2
4-methylcatechol + H2O + A
-
-
-
-
?
p-cresol + O2 + AH2
4-methylpyrocatechol + H2O + A
p-hydroquinone + O2
?
-
2% activity compared to catechol
-
-
?
p-hydroxybenzoic acid + O2
?
-
less than 1% activity compared to L-DOPA
-
-
?
p-tyrosol + O2
2-(3,4-dihydroxyphenyl)ethanol + H2O
p-tyrosol + O2 + AH2
2-(3,4-dihydroxyphenyl)ethanol + H2O + A
phaselic acid + 1/2 O2
(2S)-2-[[(2E)-3-(3,4-dioxocyclohexa-1,5-dien-1-yl)prop-2-enoyl]oxy]butanedioic acid + H2O
-
-
-
-
?
phenol + O2 + AH2
catechol + H2O + A
phenol + O2 + AH2
o-dihydroxybenzene + H2O + A
phloridzin + O2
?
-
-
-
-
?
phloroglucinol + 1/2 O2
?
protocatechuic acid + 1/2 O2
3,4-dioxocyclohexa-1,5-diene-1-carboxylic acid + H2O
-
-
-
-
?
protocatechuic acid + O2
?
protocatechuic aldehyde + 1/2 O2
3,4-dioxocyclohexa-1,5-diene-1-carbaldehyde + H2O
-
-
-
-
?
protocatechuic aldehyde + O2
?
pyrocatechol + 1/2 O2
1,2-benzoquinone + H2O
pyrocatechol + O2
?
-
-
-
?
quinol + O2
quinone + H2O
-
-
-
?
syringic acid + O2
?
-
-
-
-
?
tert-butylcatechol + 1/2 O2
4-(tert-butyl)benzo-1,2-quinone + H2O
-
hydrophobic substrate
-
-
?
trans-cinnamic acid + O2
?
tyramine + O2
4-(2-aminoethyl)cyclohexa-3,5-diene-1,2-dione + H2O
tyrosine + O2 + AH2
dopa + H2O + A
-
-
-
-
?
tyrosine + O2 + AH2
L-dopa + H2O + A
-
-
-
-
?
vanillin + O2 + AH2
3,4-dihydroxy-5-methoxybenzaldehyde + H2O + A
-
-
-
-
?
additional information
?
-
(+)-catechin + O2

?
-
-
-
-
?
(+)-catechin + O2
?
-
60.8% activity compared to L-DOPA
-
-
?
(+)-catechin + O2
?
-
-
-
-
?
(+)-catechin + O2
?
-
-
-
-
?
(+)-catechin + O2
?
-
-
-
-
?
(+)-catechin + O2
?
-
-
-
-
?
(+)-catechin + O2
?
-
-
-
-
?
(+)-catechin + O2
?
Festuca sp.
-
-
-
-
?
(+)-catechin + O2
?
Lolium sp.
-
-
-
-
?
(+)-catechin + O2
?
-
-
-
-
?
(+)-catechin + O2
?
-
-
-
-
?
(+)-catechin + O2
?
-
-
-
-
?
(+)-catechin + O2
?
-
-
-
-
?
(+)-catechin + O2
?
-
-
-
-
?
(+)-catechin hydrate + 1/2 O2

?
-
-
-
-
?
(+)-catechin hydrate + 1/2 O2
?
-
-
-
-
?
(+)-catechin hydrate + 1/2 O2
?
-
-
-
?
(+)-catechin hydrate + 1/2 O2
?
-
-
-
-
?
(+)-catechin hydrate + 1/2 O2
?
-
-
-
-
?
(-)-epicatechin + 1/2 O2

?
-
-
-
-
?
(-)-epicatechin + 1/2 O2
?
-
the major endogenous polyphenol in litchi pericarp
-
-
?
(-)-epicatechin + 1/2 O2
?
-
-
-
-
?
(-)-epicatechin + 1/2 O2
?
-
-
-
?
(-)-epicatechin + 1/2 O2
?
-
-
-
-
?
(-)-epicatechin + 1/2 O2
?
-
-
-
-
?
(-)-epicatechin + 1/2 O2
?
-
-
-
?
(-)-epicatechin + O2

?
-
-
-
-
?
(-)-epicatechin + O2
?
-
-
-
-
?
(-)-epicatechin + O2
?
-
-
-
-
?
(-)-epicatechin + O2
?
-
-
-
-
?
(-)-epicatechin + O2
?
-
-
-
-
?
(-)-epicatechin + O2
?
-
-
-
-
?
(-)-epicatechin + O2
?
Festuca sp.
-
-
-
-
?
(-)-epicatechin + O2
?
Lolium sp.
-
-
-
-
?
(-)-epicatechin + O2
?
-
-
-
-
?
(-)-epicatechin + O2
?
-
-
-
-
?
(-)-epicatechin + O2
?
-
-
-
-
?
(-)-epicatechin + O2
?
-
-
-
-
?
(-)-epicatechin + O2
?
-
119% activity at 2.5 mM substrate concentration
-
-
?
(-)-epicatechin + O2
?
-
-
-
-
?
(R)-dopaxanthin + dehydroascorbic acid + O2

(R)-dopaxanthin quinone + L-ascorbic acid + H2O
-
-
-
-
-
(R)-dopaxanthin + dehydroascorbic acid + O2
(R)-dopaxanthin quinone + L-ascorbic acid + H2O
-
(R)-dopaxanthin is a pigment, the reaction rate on the (R)-isomer of dopaxanthin is 1.9fold lower than that for the (S)-isomer
quantitative product analysis
-
?
(R)-dopaxanthin + dehydroascorbic acid + O2
(R)-dopaxanthin quinone + L-ascorbic acid + H2O
-
-
-
-
-
(RS)-catechin + O2

?
-
isoenzymes 1-3, 96, 104, and 168% of activity with L-dopa respectively
-
-
?
(RS)-catechin + O2
?
-
83% of activity with L-dopa
-
-
?
2 hydroquinone + O2

2 quinone + 2 H2O
Emerita asiatica
-
no activity with hydroquinone
-
-
-
2 hydroquinone + O2
2 quinone + 2 H2O
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2

?
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
-
i.e., E-3-carboxy-2-(3-(3,4-dihydroxyphenyl)prop-2-enoyloxy)-3-hydroxypentanedioic acid
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
Festuca sp.
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
Lolium sp.
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
-
-
-
-
?
2-O-caffeoylhydroxycitric acid + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid + O2

?
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
Festuca sp.
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
Lolium sp.
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2

?
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
Festuca sp.
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
Lolium sp.
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
-
-
-
-
?
2-O-caffeoylisocitric acid 6-methyl ester + O2
?
-
-
-
-
?
3,4,5-trihydroxy-L-phenylalanine + O2

?
-
cytotoxicity of TOPA
-
-
?
3,4,5-trihydroxy-L-phenylalanine + O2
?
-
i.e. TOPA
-
-
?
3,4,5-trihydroxybenzoic acid + O2

?
-
trivial name gallic acid
-
-
?
3,4,5-trihydroxybenzoic acid + O2
?
-
trivial name gallic acid
-
-
?
3,4-dihydroxyphenylacetic acid + O2

?
-
12% of the activity with L-dopa
-
-
?
3,4-dihydroxyphenylacetic acid + O2
?
-
-
-
-
?
3,4-dihydroxyphenylacetic acid + O2
?
-
3-methylbenzothyazolinone hydrazone, MBTH, as chromophore coupling agent
-
-
?
4-chlorophenol + O2

4-chloro-1,2-quinone + H2O
-
-
-
-
?
4-chlorophenol + O2
4-chloro-1,2-quinone + H2O
-
91% of 4-chlorophenol is oxidized after 2 h by tyrosinase
4-chloro-1,2-quinone subsequently undergoes a nucleophilic substitution reaction at the chlorine atom by excess phenol to give the corresponding phenol-quinone adduct 4-(4-chlorophenoxy)cyclohexa-3,5-diene-1,2-dione
-
?
4-cresol + O2

?
-
root and pulp enzyme
-
-
?
4-cresol + O2
?
-
-
-
-
?
4-ethoxyphenol + O2

?
-
-
-
-
?
4-ethoxyphenol + O2
?
Mushroom
-
-
-
-
-
4-fluorophenol + O2

?
-
-
-
-
?
4-fluorophenol + O2
?
-
-
-
-
?
4-hydroxybenzoic acid + O2 + AH2

3,4-dihydroxybenzoic acid + H2O + A
-
50% of activity with L-dopa
-
?
4-hydroxybenzoic acid + O2 + AH2
3,4-dihydroxybenzoic acid + H2O + A
-
-
-
?
4-hydroxyphenyl acetic acid + O2

?
-
-
-
-
?
4-hydroxyphenyl acetic acid + O2
?
Mushroom
-
-
-
-
-
4-hydroxyphenyl acetic acid + O2
?
-
-
-
-
?
4-hydroxyphenyl acetic acid + O2
?
-
-
-
-
?
4-hydroxyphenyl propionic acid + O2

?
-
-
-
-
?
4-hydroxyphenyl propionic acid + O2
?
-
-
-
-
?
4-hydroxyphenylpropionic acid + O2

?
-
85% activity compared to 3,4-dihydroxyhydrocinnamic acid
-
-
?
4-hydroxyphenylpropionic acid + O2
?
-
-
-
-
?
4-methoxyphenol + O2

?
-
-
-
-
?
4-methoxyphenol + O2
?
-
40% relative activity compared to L-DOPA, weak monophenolase activity
-
-
?
4-methylcatechol + 1/2 O2

4-methyl-1,2-benzoquinone + H2O
-
-
-
-
?
4-methylcatechol + 1/2 O2
4-methyl-1,2-benzoquinone + H2O
-
oxidation of the substrate with NaIO4 in CHCl3, and [P]CHCl3
-
-
?
4-methylcatechol + 1/2 O2
4-methyl-1,2-benzoquinone + H2O
-
-
-
-
?
4-methylcatechol + 1/2 O2
4-methyl-1,2-benzoquinone + H2O
-
-
-
-
?
4-methylcatechol + 1/2 O2
4-methyl-1,2-benzoquinone + H2O
-
diphenolic substrate
-
-
?
4-methylcatechol + 1/2 O2
4-methyl-1,2-benzoquinone + H2O
-
PPO from butter lettuce shows a higher affinity to 4-methylcatechol than to catechol
-
-
?
4-methylcatechol + 1/2 O2
4-methyl-1,2-benzoquinone + H2O
-
efficient diphenolic substrates for cherry PPO
-
-
?
4-methylcatechol + 1/2 O2
4-methyl-1,2-benzoquinone + H2O
-
best substrate
-
-
?
4-methylcatechol + 1/2 O2
4-methyl-1,2-benzoquinone + H2O
-
-
-
-
?
4-methylcatechol + O2

4-methyl-1,2-benzoquinone + H2O
-
good substrate
-
-
?
4-methylcatechol + O2
4-methyl-1,2-benzoquinone + H2O
-
highest activity
-
-
?
4-methylcatechol + O2
4-methyl-1,2-benzoquinone + H2O
-
-
-
-
?
4-methylcatechol + O2
4-methyl-1,2-benzoquinone + H2O
good substrate
-
-
?
4-methylcatechol + O2
4-methyl-1,2-benzoquinone + H2O
good substrate
-
-
?
4-methylcatechol + O2
4-methyl-1,2-benzoquinone + H2O
-
-
-
-
?
4-methylcatechol + O2
4-methyl-1,2-benzoquinone + H2O
-
-
-
-
?
4-methylcatechol + O2
4-methyl-1,2-benzoquinone + H2O
-
highest activity, 183% activity at 10 mM substrate concentration
-
-
?
4-methylcatechol + O2

4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
-
-
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
Mushroom
-
-
-
-
-
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
Mushroom
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
Mushroom
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
catecholase/cresolase activity ratio of 41
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-methylcatechol + O2
4-methyl-o-benzoquinone + H2O
-
-
-
?
4-tert-butylcatechol + 1/2 O2

4-(tert-butyl)benzo-1,2-quinone + H2O
-
-
-
?
4-tert-butylcatechol + 1/2 O2
4-(tert-butyl)benzo-1,2-quinone + H2O
-
-
-
-
?
4-[(4-methylphenyl)azo]-1,2-benzendiol + 1/2 O2

4-[(E)-(4-methylphenyl)diazenyl]cyclohexa-3,5-diene-1,2-dione + H2O
-
-
-
-
?
4-[(4-methylphenyl)azo]-1,2-benzendiol + 1/2 O2
4-[(E)-(4-methylphenyl)diazenyl]cyclohexa-3,5-diene-1,2-dione + H2O
-
synthetic substrate
-
-
?
4-[(4-methylphenyl)azo]-phenol + O2 + AH2

4-[(4-methylbenzo)azo]-1,2-benzendiol + H2O + A
-
-
-
-
?
4-[(4-methylphenyl)azo]-phenol + O2 + AH2
4-[(4-methylbenzo)azo]-1,2-benzendiol + H2O + A
-
synthetic substrate
-
-
?
alpha-methyl-DL-tyrosine + O2 + AH2

N-methyl-DL-dopa + H2O + A
-
-
-
-
?
alpha-methyl-DL-tyrosine + O2 + AH2
N-methyl-DL-dopa + H2O + A
-
-
-
-
?
caffeic acid + 1/2 O2

caffeoyl quinone + H2O
-
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
-
-
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
17% of activity with L-dopa
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
diphenolic caffeic acid is oxidized relatively fast by all tyrosinases, except only moderately by tyrosinase from Pycnoporus sanguineus
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
?
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
-
caffeic acid + 1/2 O2
caffeoyl quinone + H2O
-
-
-
-
?
caffeic acid + O2

?
-
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2
?
-
-
-
?
caffeic acid + O2
?
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2
?
Festuca sp.
-
-
-
-
?
caffeic acid + O2
?
Lolium sp.
-
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2
?
-
-
-
-
?
caffeic acid + O2

caffeoyl quinone + H2O
-
-
-
-
?
caffeic acid + O2
caffeoyl quinone + H2O
-
60.9% activity compared to L-DOPA
-
-
?
caffeic acid + O2
caffeoyl quinone + H2O
-
50% activity compared to catechol
-
-
?
caffeic acid + O2
caffeoyl quinone + H2O
-
31% activity at 2.5 mM substrate concentration
-
-
?
caffeic acid + O2
caffeoyl quinone + H2O
-
31% activity at 2.5 mM substrate concentration
-
-
?
caffeic acid + O2
caffeoyl quinone + H2O
-
-
-
-
?
catechin + O2

?
-
-
-
-
?
catechol + 1/2 O2

1,2-benzoquinone + H2O
-
pyrogallol and catechol are best substrates for catalysis and inactivation
-
-
?
catechol + 1/2 O2
1,2-benzoquinone + H2O
-
-
-
-
?
catechol + 1/2 O2
1,2-benzoquinone + H2O
-
-
-
?
catechol + 1/2 O2
1,2-benzoquinone + H2O
-
24% of the activity with L-dopa
-
-
?
catechol + 1/2 O2
1,2-benzoquinone + H2O
-
-
-
-
?
catechol + 1/2 O2
1,2-benzoquinone + H2O
-
-
-
-
?
catechol + 1/2 O2
1,2-benzoquinone + H2O
-
-
-