title: Quantitative measurement of cerebral cytochrome P-450 by second derivative spectrophotometry.
abstract: Second order derivative spectrophotometry was used to improve the accuracy and reproducibility of cytochrome P-450 measurements in subcellular fractions obtained from the brain. This method allowed better resolution of the overlapping bands of cytochrome P-450 and other iron proteins, as well as a reduction of the effects of turbidity and non-specific components. Using this method, the cytochrome P-450 content of rat brain mitochondrial and microsomal fractions was measured to be 74.2 +/- 2.3 and 5.9 +/- 0.3 pmol/mg protein, respectively.
mesh_terms: D000818:Animals; D001189:Aryl Hydrocarbon Hydroxylases / Q000096:biosynthesis; D001921:Brain / Q000201:enzymology / Q000378:metabolism*; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism*; D004790:Enzyme Induction / Q000187:drug effects; D008297:Male; D008748:Methylcholanthrene / Q000494:pharmacology; D008861:Microsomes / Q000378:metabolism; D008928:Mitochondria / Q000378:metabolism; D051381:Rats; D011919:Rats, Inbred Strains; D013053:Spectrophotometry / Q000379:methods*; D013347:Subcellular Fractions / Q000378:metabolism
chemical_list: D008748:Methylcholanthrene; D003577:Cytochrome P-450 Enzyme System; D001189:Aryl Hydrocarbon Hydroxylases