Tags: Enzyme.
In enzymology a 21-hydroxysteroid dehydrogenase (NAD+) (EC 1.1.1.150) is an enzyme that catalyzes the chemical reactionpregnan-21-ol + NAD+ pregnan-21-al + NADH + H+Thus the two substrates of this enzyme are pregnan-21-ol and NAD+ whereas its 3 products are pregnan-21-al NADH and H+.This enzyme belongs to the family of oxidoreductases specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor.