The final step in heme metabolism in mammals is catalyzed by the cytosolic biliverdin reductase enzymes A and B (EC 22.214.171.124) [taken from NCBI Entrez Gene (Gene ID: 645)].
biliverdin reductase B
Biliverdin reductase B•
epididymis secretory protein Li 10•
flavin reductase (NADPH)•
green heme-binding protein•
short chain dehydrogenase/reductase family 43U, member 1•