title: Selective forces and the maintenance of immunoglobulin polymorphisms.
mesh_terms: D000328:Adult; D001315:Australia; D005787:Gene Frequency; D006801:Humans; D007136:Immunoglobulins / Q000235:genetics*; D011110:Polymorphism, Genetic; D012641:Selection, Genetic; D044465:White People
chemical_list: D007136:Immunoglobulins