The antigenic substances "A" and "B" in the sera of healthy subjects.
D000017:ABO Blood-Group System; D000293:Adolescent; D000328:Adult; D000941:Antigens; D004912:Erythrocytes / Q000276:immunology; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007223:Infant; D007519:Isoantigens / Q000032:analysis*; D008297:Male
D000017:ABO Blood-Group System; D000941:Antigens; D007519:Isoantigens