This enzyme is required for electron transfer from NADP to cytochrome P450 in microsomes. It can also provide electron transfer to heme oxygenase and cytochrome B5. MAVSSSSDVIVLSVGIILAALYLFREQIFSAAKPKTVQVPSSKAAAGGNGNPRDFIAKMKEGKKRIVIFYGSQTGTAEEYAIRLAKEAKSKFGLASLVCDPEEYDFENLDQVPEDCCVFFVMATYGEGEPTDNAVQLCQNLSDESFEFSNGEHKLPGLKYVIFGLGNKTYEHYNLISRNVDRDLQKMGAIRIGERGEGDDDKSMEEDYLEWKDGMWEAFAKAMNVEEGQGGDSPDFVVTEVFDHPEEKVYLGELSARALTRTKGIHDAKNPYPAPIIAAKELFAPGSDRNCVHIELSTESSGITYQHGDHVGVWPSNADKEVDRLLYALGLHEKKDTVINIESLDPALAKVPFPVPTTYATVLRHYIDISALAGRQILGVLAKFAPNPEAEAVLKDLNSNKEHYQNIVANGCMKLGEVLQYAAGNDLHADPTASNTTAWKIPFDIIVSSIPRLQPRYYSISSSPKLYPNAIHATVVVLKYKSEKAPRVEERWIYGVGSNFLLNLKYASHHDKAATLVSDDSPSEPSIVSHYPTYSIEGPRGAYKQGDVVKVPIHVRRSTFRLPTNPKSPVIMIGPGTGVAPFRGFVQERVAMARRTIEKHGPEGLADWGPIRLYYGCRRSDQDFLYKDEWPEYAKELHGKFIMRCAFSREPPYKPDGSKIYVQDLIWEDAEQIADAILNGKGYVYICGDAKSMSKSVEETLCRILGEAKGGSAEVEGAAELKLLKERNRLLLDVWS 736 CPR NCPR_PHACH NADPH--cytochrome P450 reductase