Abstract
1. Eight different forms of cytochrome P-450 have been purified to electrophoretic homogeneity. Electrophoretic, spectral and catalytic properties of these cytochrome P-450s are presented and comparison is made with preparations presented elsewhere in the literature. 2. The levels of these forms of cytochrome P-450 present in liver microsomes of rats treated with various compounds have now been quantified. Several forms of cytochrome P-450 are induced, in a more or less coordinate manner, while levels of other cytochrome P-450s are lowered, during administration of commonly used inducing agents. 3. The role of cytochrome P-450 purification and characterization studies in the understanding of the total field is discussed, along with directions in which future research is needed.
Published Version
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