The ''T'' allele is associated with reduced plasma folate [R].

Women with CT and TT genotypes had higher red blood cell folate concentrations, not significantly associated with serum folate or homocysteine levels [R].

Methotrexate (antifolate drug) uptake was lowest in individuals with CC genotype than those with CT or TT genotypes [R]. 

rs1051266

Parent Gene: SLC19A1

Importance: 2
Less common allele: C = 49%
More common allele: T = 51%
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