title: Ag(d), a further factor of the Ag-system.
mesh_terms: D000042:Absorption; D000906:Antibodies; D000918:Antibody Specificity; D001789:Blood Group Antigens; D002648:Child; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007106:Immune Sera; D005779:Immunodiffusion; D013789:Thalassemia / Q000276:immunology*
chemical_list: D000906:Antibodies; D001789:Blood Group Antigens; D007106:Immune Sera