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. Author manuscript; available in PMC: 2018 Feb 1.
Published in final edited form as: Expert Rev Clin Pharmacol. 2017 Oct 12;11(2):151–164. doi: 10.1080/17512433.2017.1353909

Table 1.

Frequencies of CYP2C19 alleles in major ethnic groups.

Allele African American European East Asian South/Central
Asian
*1 0.68 0.69 0.63 0.60 0.62
*2 0.15 0.12 0.15 0.29 0.35
*3 0.0052 0.00028 0.0042 0.089 0.024
*17 0.16 0.18 0.21 0.027 ND

ND: not determined.

Among various reports of allele frequency, we present the value from Clinical Pharmacogenetics Implementation Consortium Guidelines for CYP2C19 Genotype and Clopidogrel Therapy [47]