Figure 2From: Inactive alleles of cytochrome P450 2C19 may be positively selected in human evolutionCYP2C19 poor metabolism haplotypes and their frequencies in the study populations. Sweep 1.1 was used to determine haplotypes and extended haplotype homozygosity at the CYP2C19*2 locus from 500 individuals including Gambians and HapMap populations. CYP2C19*3 was found only in the Asian population.Back to article page