title: Function of the activated fourth component of complement (C4b) in activation of C2.
mesh_terms: D003166:Complement Activating Enzymes / Q000378:metabolism; D003167:Complement Activation / Q000187:drug effects; D003172:Complement C1 / Q000378:metabolism; D003175:Complement C2 / Q000378:metabolism*; D003181:Complement C4 / Q000378:metabolism*; D015935:Complement C4b; D004546:Elapid Venoms / Q000494:pharmacology; D006801:Humans; D066298:In Vitro Techniques
chemical_list: D003172:Complement C1; D003175:Complement C2; D003181:Complement C4; D004546:Elapid Venoms; D015935:Complement C4b; D003166:Complement Activating Enzymes