{{Rsnum
|rsid=1677693
|Gene=DHFR
|Chromosome=5
|position=80640499
|Orientation=minus
|GMAF=0.2016
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(A;A)
|geno2=(A;C)
|geno3=(C;C)
|Gene_s=DHFR
}}{{ population diversity
| geno1=(A;A)
| geno2=(A;C)
| geno3=(C;C)
| CEU | 5.3 | 34.5 | 60.2
| HCB | 0.0 | 6.6 | 93.4
| JPT | 0.0 | 3.5 | 96.5
| YRI | 8.3 | 46.9 | 44.8
| ASW | 10.5 | 31.6 | 57.9
| CHB | 0.0 | 6.6 | 93.4
| CHD | 0.0 | 11.0 | 89.0
| GIH | 14.9 | 39.6 | 45.5
| LWK | 4.5 | 40.9 | 54.5
| MEX | 3.4 | 31.0 | 65.5
| MKK | 10.9 | 46.2 | 42.9
| TSI | 11.8 | 38.2 | 50.0
| HapMapRevision=28
}}{{PMID Auto
|PMID=20615890
|Title=A candidate gene study of folate-associated one carbon metabolism genes and colorectal cancer risk
|OA=1
}}

{{PMID|19064578|OA=1
}} No association of single nucleotide polymorphisms in one-carbon metabolism genes with prostate cancer risk.

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Illumina Human 1M}}