{{Rsnum
|rsid=2235035
|Gene=ABCB1
|Chromosome=7
|position=87549770
|Orientation=minus
|GMAF=0.2888
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|Gene_s=ABCB1
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;T)
| geno3=(T;T)
| CEU | 53.1 | 42.5 | 4.4
| HCB | 57.7 | 33.6 | 8.8
| JPT | 47.8 | 40.7 | 11.5
| YRI | 66.9 | 28.3 | 4.8
| ASW | 71.4 | 25.0 | 3.6
| CHB | 57.7 | 33.6 | 8.8
| CHD | 49.5 | 45.0 | 5.5
| GIH | 67.3 | 27.7 | 5.0
| LWK | 64.8 | 28.7 | 6.5
| MEX | 39.7 | 46.6 | 13.8
| MKK | 62.1 | 31.4 | 6.5
| TSI | 48.0 | 39.2 | 12.7
| HapMapRevision=28
}}

{{PMID|18474294}} C allele linked to colorectal cancers

{{ neighbor
| rsid = 1128503
| distance = 515
}}

{{PMID|15197162|OA=1
}} Identifying candidate causal variants responsible for altered activity of the ABCB1 multidrug resistance gene.

{{PMID|15505619}} Polymorphisms in multidrug resistance 1 (MDR1) gene are associated with refractory Crohn disease and ulcerative colitis.

{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Affy GenomeWide 6}}
{{on chip | Affy500k}}
{{on chip | FTDNA2}}
{{on chip | HumanOmni1Quad}}
{{on chip | Illumina Human 1M}}