title: A single chain precursor of C4 in human serum.
mesh_terms: D003181:Complement C4 / Q000096:biosynthesis*; D000939:Epitopes; D006801:Humans; D046911:Macromolecular Substances; D008970:Molecular Weight; D011498:Protein Precursors / Q000097:blood* / Q000276:immunology
chemical_list: D003181:Complement C4; D000939:Epitopes; D046911:Macromolecular Substances; D011498:Protein Precursors