[Cytochrome P450 2C19 gene polymorphism in 104 Chinese Zang volunteers].

Cytochrome P 450 2C19 (CYP2C19) is involved in the metabolism of a number of clinically used drugs. Individuals can be characterized as extensive metabolizers (EMs) or poor metabolizers (PMs) , according to the drugs-metabolized ability of CYP2C19 in population studies. The incidence of poor metabolizer phenotype shows marked interracial differences. In this article we report the gene polymorphism of CYP2C19 in Zang population. There were 49 wild-type homozygotes (wt/wt) , 46 were heterozygotes (wt/m1) and 9 were homozygotes (m1/m1) among 104 unrelated Zang subjects. The frequency of CYP2C19(m1) allele was 0.308, which was in agreement with that in other published data.