the more highly purified cytochrome fractions ( iv b ) contain 9-11 moles of cytochrome p-450 or p-448 per mg protein ( an approximately 5-7 fold purification over microsomes ) and are enzymatically active in the metabolism of a variety of substrates when combined with lipid and nadph-cytochrome c reductase .
C0010762
cytochrome p-450
C0025519
metabolism