1.11.2.1 cytochrome P450 - 1.11.2.1 heme - 1.11.2.1 heme heme-thiolate protein 1.11.2.1 heme containing a FeIII/FeII couple 1.11.2.1 heme the enzyme contains about 0.5 mol of heme per mole of protein 1.11.2.1 NADH -