title: 'Natural' anti-A and anti-B with small combining sites, together with anti-P, in the serum of the South African snake Python sebae.
mesh_terms: D000017:ABO Blood-Group System; D000818:Animals; D001666:Binding Sites, Antibody; D001789:Blood Group Antigens; D006801:Humans; D010127:P Blood-Group System; D012911:Snakes / Q000097:blood*
chemical_list: D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D010127:P Blood-Group System