1. References

In enzymology, a cob(II)alamin reductase ({{EC number|1.16.1.4}}) is an enzyme that catalyzes the chemical reaction

2 cob(I)alamin + NAD⁺ 2 cob(II)alamin + NADH + H⁺

Thus, the two substrates of this enzyme are cob(I)alamin and NAD⁺, whereas its 3 products are cob(II)alamin, NADH, and H⁺.

This enzyme belongs to the family of oxidoreductases, specifically those oxidizing metal ion with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is cob(I)alamin:NAD+ oxidoreductase. Other names in common use include vitamin B12r reductase, B12r reductase, and NADH2:cob(II)alamin oxidoreductase. This enzyme participates in porphyrin and chlorophyll metabolism. It employs one cofactor, FAD.

References

• {{cite journal | vauthors = Walker GA, Murphy S, Huennekens FM | date = 1969 | title = Enzymatic conversion of vitamin B 12a to adenosyl-B 12: evidence for the existence of two separate reducing systems | journal = Arch. Biochem. Biophys. | volume = 134 | pages = 95–102 | pmid = 4390543 | doi = 10.1016/0003-9861(69)90255-0 | issue = 1 }}

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