highly significantP values <10 −4
Geographical distribution of folate-mediated one-carbon metabolism pathway alleles and genotypes showing continental variation and intra-population differences in Mexican Mestizos In contrast to the additional four out of the eight variants analyzed, MTRR A66G, MTHFR C677T, A1298AC and MTHFD1 G1958A showed a gradient in the frequency between MEX groups and highly significant differences between AMI and EUR groups ( P values <10 −4 ).