{{Rsnum
|rsid=34305973
|geno1=(-;-)
|geno2=(-;T)
|geno3=(T;T)
|Chromosome=6
|Orientation=plus
|Gene=SLC22A1
|position=160139850
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|Gene_s=SLC22A1
}}{{PharmGKB
|RSID=rs34305973
|Name_s=part of SLC22A1:M420del
|Gene_s=SLC22A1
|Feature=Exon/NonSyn
|Evidence=PubMed ID:19940846
|Annotation=Reduced metformin uptake in transfected cells
|Drugs=metformin; MPP+
|Drug Classes=
|Diseases=
|Curation Level=Non-Curated
|PharmGKB Accession ID=PA165111562
}}