title: Electrophoretic polymorphism of the fourth component of human complement (C4) in paired maternal and foetal plasmas.
mesh_terms: D000937:Antigen-Antibody Reactions; D001769:Blood; D003165:Complement System Proteins / Q000032:analysis* / Q000096:biosynthesis; D005260:Female; D005333:Fetus / Q000276:immunology; D006801:Humans; D007122:Immunoelectrophoresis; D007125:Immunogenetics; D008297:Male; D008431:Maternal-Fetal Exchange; D011110:Polymorphism, Genetic; D011247:Pregnancy; D014470:Umbilical Cord
chemical_list: D003165:Complement System Proteins