title: A rare blood group antigen An a (Ahonen).
mesh_terms: D000368:Aged; D001789:Blood Group Antigens; D005260:Female; D005387:Finland; D008040:Genetic Linkage; D006579:Heterozygote; D006801:Humans; D007518:Isoantibodies; D007519:Isoantigens / Q000032:analysis*; D008297:Male; D010375:Pedigree
chemical_list: D001789:Blood Group Antigens; D007518:Isoantibodies; D007519:Isoantigens