title: The d, y, x and t determinants.
mesh_terms: D000818:Animals; D000939:Epitopes; D000882:Haplorhini; D006511:Hepatitis B Antigens / Q000145:classification*; D006801:Humans; D012703:Serotyping
chemical_list: D000939:Epitopes; D006511:Hepatitis B Antigens