Title : Relationship between CYP2C9 and 2C19 genotypes and tolbutamide methyl hydroxylation and S-mephenytoin 4'-hydroxylation activities in livers of Japanese and Caucasian populations.

Pub. Date : 1997 Apr

PMID : 9170147






3 Functional Relationships(s)
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1 Relationship between CYP2C9 and 2C19 genotypes and tolbutamide methyl hydroxylation and S-mephenytoin 4"-hydroxylation activities in livers of Japanese and Caucasian populations. Tolbutamide cytochrome P450 family 2 subfamily C member 9 Homo sapiens
2 Good correlations were found between levels of CYP2C9 and activities of tolbutamide methyl hydroxylation (r = 0.77) and between levels of CYP2C19 and activities of S-mephenytoin 4"-hydroxylation (r = 0.86) in liver microsomes of the human samples examined. Tolbutamide cytochrome P450 family 2 subfamily C member 9 Homo sapiens
3 Tolbutamide methyl hydroxylation activities were lower in human samples with the Leu359 allele of CYP2C9 than those with the Cys144 allele and wild-type (Arg144-Ile359); the former type showed slightly higher K(m) values. Tolbutamide cytochrome P450 family 2 subfamily C member 9 Homo sapiens