The third (C3) and the fourth (C4) components of complement: labile binding site and covalent bond formation.
D000595:Amino Acid Sequence; D000936:Antigen-Antibody Complex; D001665:Binding Sites; D003176:Complement C3 / Q000378:metabolism*; D003181:Complement C4 / Q000378:metabolism*; D006801:Humans; D019811:Hydroxylamine; D006898:Hydroxylamines / Q000494:pharmacology; D010446:Peptide Fragments / Q000032:analysis; D011485:Protein Binding; D011487:Protein Conformation; D013438:Sulfhydryl Compounds / Q000032:analysis
D000936:Antigen-Antibody Complex; D003176:Complement C3; D003181:Complement C4; D006898:Hydroxylamines; D010446:Peptide Fragments; D013438:Sulfhydryl Compounds; D019811:Hydroxylamine