 Aquacobalamin reductase (NADPH)

Aquacobalamin reductase (NADPH) () is an enzyme that catalyzes the chemical reaction

Thus, the two substrates of this enzyme are cob(II)alamin and nicotinamide adenine dinucleotide phosphate ion, whereas its 3 products are aquacob(III)alamin, nicotinamide adenine dinucleotide phosphate, and hydrogen ion.This enzyme belongs to the family of oxidoreductases, specifically those oxidizing metal ion with NAD+ or NADP+ as acceptor.