Tags: Enzyme.
In enzymology a progesterone 5alpha-reductase (EC 1.3.1.30) is an enzyme that catalyzes the chemical reaction5alpha-pregnan-320-dione + NADP+ progesterone + NADPH + H+Thus the two substrates of this enzyme are 5alpha-pregnan-320-dione and NADP+ whereas its 3 products are progesterone NADPH and H+.This enzyme belongs to the family of oxidoreductases specifically those acting on the CH-CH group of donor with NAD+ or NADP+ as acceptor.