Enzyme Commission Number
EC 1.23.5.1
Product Overview
High-quality enzyme products.
Well-established quality management system.
Reaction
violaxanthin + 2 L-ascorbate = zeaxanthin + 2 L-dehydroascorbate + 2 H2O (overall reaction)
(1a) violaxanthin + L-ascorbate = antheraxanthin + L-dehydroascorbate + H2O
(1b) antheraxanthin + L-ascorbate = zeaxanthin + L-dehydroascorbate + H2O
Systematic Name
violaxanthin:ascorbate oxidoreductase
Function
Along with EC 1.14.15.21, zeaxanthin epoxidase, this enzyme forms part of the xanthophyll (or violaxanthin) cycle for controlling the concentration of zeaxanthin in chloroplasts. It is activated by a low pH of the thylakoid lumen (produced by high light intensity). Zeaxanthin induces the dissipation of excitation energy in the chlorophyll of the light-harvesting protein complex of photosystem II. In higher plants the enzyme reacts with all-trans-diepoxides, such as violaxanthin, and all-trans-monoepoxides, but in the alga Mantoniella squamata, only the diepoxides are good substrates.
Production Methods
Fermentation
Package
on customer request
Applications
Research Use
Storage
Should be stored in a dry and cool place, avoiding high temperature.
Appearance / Form
powder or liquid
Odor
Normal microbial fermentation odour.
WARNINGS
Keep sealed after use every time to avoid microbial infections and inactivation of enzymes until its finish.
Description
Microbial enzymes have been used in a large number of fields, such as chemical, agricultural and biopharmaceutical industries. Our enzyme production services are based on bacteria, fungi, and yeast, from strain selection, optimization, and process development to scale-up production.
