Liu Z, Franklin MR. Cytochrome P-450 metabolic-intermediate complex formation from p-aminobenzoic acid esters and other arylamines.
Eur J Drug Metab Pharmacokinet 1984;
9:155-9. [PMID:
6611263 DOI:
10.1007/bf03189619]
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Abstract
Metabolism of a series of p-aminobenzoic acid esters by rat liver microsomal fractions resulted in the formation of cytochrome P-450 metabolic - intermediate complexes. With conditions that allowed complex formation to proceed to completion, about 20% of control rat cytochrome P-450 was sequestered as a complex. Phenobarbital, but not beta-naphthoflavone induced additional cytochrome P-450, which with specific esters could be complexed to about 60%. For other esters, the induced cytochrome maximally complexed to about 20%, as was seen in uninduced rats. The two groups of p-aminobenzoic acid esters could not be readily delineated by lipid/water partition coefficients or steric factors.
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