{{Rsnum
|rsid=2129785
|Chromosome=17
|Orientation=plus
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
|Gene=BLMH
|position=30263512
|Gene_s=BLMH
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
}}{{ population diversity
| geno1=(A;A)
| geno2=(A;G)
| geno3=(G;G)
| CEU | 76.9 | 16.9 | 6.2
| HCB | 98.5 | 1.5 | 0.0
| JPT | 100.0 | 0.0 | 0.0
| YRI | 100.0 | 0.0 | 0.0
| ASW | 0.0 | 0.0 | 0.0
| CHB | 98.5 | 1.5 | 0.0
| CHD | 99.1 | 0.9 | 0.0
| GIH | 0.0 | 0.0 | 0.0
| LWK | 0.0 | 0.0 | 0.0
| MEX | 0.0 | 0.0 | 0.0
| MKK | 0.0 | 0.0 | 0.0
| TSI | 0.0 | 0.0 | 0.0
| HapMapRevision=28
}}Based on {{PMID|21670732|OA=1
}} with 2823 samples a haplotype of A+A in [[rs2129785]]+[[rs11867581]] predicts short allele of [[5-HTTLPR]] with good accuracy. Haplotype G+G has not been generally observed, so phase can always be determined. The only possible haplotypes are thus A+A short 91% of the time, A+G long 96% of the time and G+A always long. {{PMID|22504458}} uses regression model over eight [[SNP]]'s available on [[Illumina]] [[microarray]] with higher expected accuracy.

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | FTDNA2}}
{{on chip | HumanOmni1Quad}}
{{on chip | Illumina Human 1M}}