Plasmodium vivax msp3α genotypes. PCR products were digested with Alu I, and the digested products are separated side-by-side with their undigested products on agarose gels. a) Shows different genotypes indicated by capital letters underneath. b) Lanes 1, 3, 5, 7, 9, and 11 are undigested products of ~2.0 kb, and lanes 2, 4, 6, 8, 10, and 12 were the same products digested with Alu I. Lane 2 presents genotype C; lane 4, 10, and 12 present genotype B; lane 6 and 8 are mixed genotypes of A+C; c) genotype G; d) genotype D; and e) genotype H. m, 100 bp DNA ladder.