title: An unusual variant of blood group A.
abstract: A blood specimen from a forensic science case appeared to violate Landsteiner's Rule. The red cells failed to react with anti-A, anti-B, or O serum while reacting strongly with Ulex europaeus lectin but not other anti-A lectins. The saliva from the person involved was found to contain both A and H blood group substances in a ratio of 4:1. The blood group was determined to be type Am.
authors.affiliation: Criminalistics Laboratory, Philadelphia Police Department, PA.
authors.forename: C S
authors.initials: CS
authors.lastname: Tumosa
authors.forename: R
authors.initials: R
authors.lastname: Dowd
mesh_terms: D000017:ABO Blood-Group System / Q000276:immunology*; D006801:Humans; D007519:Isoantigens / Q000032:analysis; D012463:Saliva / Q000276:immunology
chemical_list: D000017:ABO Blood-Group System; D007519:Isoantigens