title: Immunodiffusion studies of blood group A antigen.
mesh_terms: D000017:ABO Blood-Group System; D002462:Cell Membrane; D000939:Epitopes; D004912:Erythrocytes / Q000276:immunology*; D006801:Humans; D007106:Immune Sera; D005779:Immunodiffusion; D007070:Immunoglobulin A / Q000032:analysis; D037102:Lectins; D012463:Saliva / Q000276:immunology
chemical_list: D000017:ABO Blood-Group System; D000939:Epitopes; D007106:Immune Sera; D007070:Immunoglobulin A; D037102:Lectins