title: The classical complement pathway: mechanism of activation of the first component by antigen-antibody complexes.
mesh_terms: D000936:Antigen-Antibody Complex; D003166:Complement Activating Enzymes / Q000378:metabolism; D003167:Complement Activation; D003172:Complement C1 / Q000378:metabolism*; D015922:Complement C1q; D003171:Complement Pathway, Classical; D006801:Humans; D046911:Macromolecular Substances; D010447:Peptide Hydrolases / Q000494:pharmacology; D011951:Receptors, Complement
chemical_list: D000936:Antigen-Antibody Complex; D003172:Complement C1; D046911:Macromolecular Substances; D011951:Receptors, Complement; D015922:Complement C1q; D003166:Complement Activating Enzymes; D010447:Peptide Hydrolases