T7755
Tyrosinase from mushroom
≥2,000 units/mg solid
Synonym(s):
Catechol Oxidase, Monophenol Monooxygenase, Monophenol, dihydroxyphenylalanine:oxygen oxidoreductase, Polyphenol Oxidase
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About This Item
CAS Number:
UNSPSC Code:
12352200
EC Number:
232-653-4
MDL number:
specific activity
≥2,000 units/mg solid
foreign activity
polyphenol oxidase and catechol oxidase, present
storage temp.
−20°C
General description
Isoelectric point (pI): 4.7-5
pH optimum is 6-7
Molecular weight: 128 kDa by sedimentation velocity diffusion; 133 kDa by light-scattering measurements, and 119.5 kDa by electrophoresis.
Tyrosinase is a copper-containing oxidase, which has activity for both catechols and cresol. It is responsible for browning reactions. The enzyme is reported to have two binding sites for aromatic substrates and a different binding site for oxygen-copper. The copper is probably Cu(I), with inactivation involving oxidation to Cu(II) ion.
pH optimum is 6-7
Molecular weight: 128 kDa by sedimentation velocity diffusion; 133 kDa by light-scattering measurements, and 119.5 kDa by electrophoresis.
Tyrosinase is a copper-containing oxidase, which has activity for both catechols and cresol. It is responsible for browning reactions. The enzyme is reported to have two binding sites for aromatic substrates and a different binding site for oxygen-copper. The copper is probably Cu(I), with inactivation involving oxidation to Cu(II) ion.
Biochem/physiol Actions
Converts tyrosine to L-DOPA or tyramine to dopamine
Other Notes
One unit = ΔA280 of 0.001 per min at pH 6.5 at 25 °C in 3 mL reaction mix containing L-tyrosine.
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Yang Yao et al.
International journal of molecular sciences, 12(10), 7048-7058 (2011-11-11)
Phenolic acids have been identified in a variety of legumes including lima bean, broad bean, common bean, pea, jack bean, goa bean, adzuki bean, hyacinth bean, chicking vetch, garbanzo bean, dral, cow bean, rice bean, mung bean and soybean. The
Eric W C Chan et al.
Pharmacognosy research, 3(3), 178-184 (2011-10-25)
Chlorogenic acid (CGA) or 5-caffeoylquinic acid, was found to be the dominant phenolic compound in leaves of Etlingera elatior (Zingiberaceae). The CGA content of E. elatior leaves was significantly higher than flowers of Lonicera japonica (honeysuckle), the commercial source. In
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