title: Monoclonal antibody to a human germ cell membrane glycoprotein that inhibits fertilization.
abstract: A monoclonal antibody to an antigen in the human germ cell membrane did not agglutinate or immobilize sperm but inhibited binding and penetration of zona-free hamster ova by human sperm and blocked murine fertilization in vitro. The antibody, of the 2a subclass of immunoglobulin G, was germ cell-specific but not species-specific. It recognized a single antigen of 23 kilodaltons that has been isolated from human germ cells. This fertilization antigen, located on the postacrosome , midpiece, and tail of human sperm, is a glycoprotein of testicular origin associated with some types of human involuntary immunoinfertility .
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D006224:Cricetinae; D005260:Female; D005306:Fertilization; D006801:Humans; D006825:Hybridomas / Q000276:immunology; D008297:Male; D008565:Membrane Proteins / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D010063:Ovum / Q000276:immunology; D013094:Spermatozoa / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D008565:Membrane Proteins