Tags: Enzyme.
In enzymology a 20-α-hydroxysteroid dehydrogenase (EC 1.1.1.149) is an enzyme that catalyzes the chemical reaction17alpha20alpha-dihydroxypregn-4-en-3-one + NAD(P)+ 17alpha-hydroxyprogesterone + NAD(P)H + H+The 3 substrates of this enzyme are 17alpha20alpha-dihydroxypregn-4-en-3-one NAD+ and NADP+ whereas its 4 products are 17-alpha-hydroxyprogesterone NADH NADPH 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.