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M0145多酚氧化酶(菌菇)/酪氨酸酶/Polyphenol oxidase
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  • M0145 產(chǎn)品型號
  • 品牌
  • 生產(chǎn)商 廠商性質(zhì)
  • 上海市 所在地

訪問次數(shù):1323更新時間:2017-07-19 13:24:57

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中級會員·17年
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產(chǎn)品簡介
BR,500u/mg
產(chǎn)品介紹

 Description
Frequently Asked Questions Live Chat and Frequently Asked Questions are available for this Product.
Biochem/physiol Actions Converts tyrosine to L-DOPA or tyramine to dopamine
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.
Unit Definition One unit = ΔA280 of 0.001 per min at pH 6.5 at 25 °C in 3 mL reaction mix containing L-tyrosine.

Properties
form lyophilized powder
storage temp. −20°C

Safety
Personal Protective Equipment Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
Safety Statements 22-24/25
WGK Germany 2
 



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