{{Rsnum
|rsid=7687256
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|Chromosome=4
|Orientation=plus
|Gene=GYPA
|position=144120555
|Gene_s=GYPA
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
}}[[rs7687256]] is a SNP on the [[GYPA]] gene known as 71G>A, which can be used to define the MN blood group.