Cytochrome P450 reductase

Cytochrome P450 reductase (also known as NADPH:ferrihemoprotein oxidoreductase, NADPH:hemoprotein oxidoreductase, NADPH:P450 oxidoreductase, P450 reductase, POR, CPR, CYPOR) is a membrane-bound enzyme required for electron transfer from NADPH to cytochrome P450 and other heme proteins including heme oxygenase in the endoplasmic reticulum of the eukaryotic cell. == Gene == Human POR gene has 16 exons and the exons 2-16 code for a 677-amino acid POR protein (NCBI NP_000932.2).

Source: Wikipedia — Cytochrome P450 reductase (CC BY-SA 4.0)