title: Null types of the human erythrocyte blood groups. Philip Levine award lecture.
abstract: Null types of 12 human erythrocyte blood groups are reviewed. They have helped in identifying new antigens and defining the various genetically-distinct systems. They are very valuable in identifying the antibodies in alloimmunized people and in transfusion therapy of some of these people. Fy(a-b-) erythrocytes resist invasion by malarial parasites. At least two (Rh null and the McLeod type) are responsible for congenital hemolytic disorders. Testing for K15(Kx) on neutrophils appears to be diagnostic for chronic granulomatous disease of the sex-linked recessive type.
mesh_terms: D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D004375:Duffy Blood-Group System; D004912:Erythrocytes / Q000276:immunology*; D005796:Genes; D006801:Humans; D007626:Kell Blood-Group System; D007667:Kidd Blood-Group System; D007983:Lewis Blood Group Antigens; D008188:Lutheran Blood-Group System; D008951:MNSs Blood-Group System; D008297:Male; D010127:P Blood-Group System; D010334:Paternity; D012204:Rh-Hr Blood-Group System
chemical_list: D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D004375:Duffy Blood-Group System; D007626:Kell Blood-Group System; D007667:Kidd Blood-Group System; D007983:Lewis Blood Group Antigens; D008188:Lutheran Blood-Group System; D008951:MNSs Blood-Group System; D010127:P Blood-Group System; D012204:Rh-Hr Blood-Group System