title: Somatic generation of a genetic polymorphism: towards the solution of the I-J enigma.
mesh_terms: D001853:Bone Marrow / Q000276:immunology; D000939:Epitopes / Q000235:genetics*; D008285:Major Histocompatibility Complex; D010641:Phenotype; D011110:Polymorphism, Genetic
chemical_list: D000939:Epitopes