Demonstration of Le x  substance in the saliva of ABH non-secretors.
D000017:ABO Blood-Group System; D000373:Agglutinins / Q000032:analysis; D001789:Blood Group Antigens; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007983:Lewis Blood Group Antigens; D012463:Saliva / Q000276:immunology*
D000017:ABO Blood-Group System; D000373:Agglutinins; D001789:Blood Group Antigens; D007983:Lewis Blood Group Antigens