The methylenetetrahydrofolic acid reductase (MTHFR) C677T polymorphism causes an amino-acid change from alanine to valine and results in the enzyme becoming thermolabile and half decreased activity.

Because of natural selection, different alleles are more likely to confer a survival advantage in different environments. Cycles of infectious disease prevalence and virulence often reflect natural ...

The human dopamine transporter (DAT1) gene contains a variable number of tandem repeats (VNTR) in its 3′-untranslated region (UTR). The linkage and association between the VNTR polymorphism of DAT1 ...