title: A frequent polymorphism of the complement component C4 gene.
mesh_terms: D002906:Chromosomes, Human, 6-12 and X; D003181:Complement C4 / Q000235:genetics*; D004262:DNA Restriction Enzymes / Q000235:genetics; D006801:Humans; D011110:Polymorphism, Genetic
chemical_list: D003181:Complement C4; D004262:DNA Restriction Enzymes