Activation of a complex of C1r and C1s subcomponents of human complement C1 by the third subcomponent C1q.
D003166:Complement Activating Enzymes / Q000302:isolation & purification / Q000378:metabolism*; D003167:Complement Activation / Q000187:drug effects; D015922:Complement C1q; D015923:Complement C1r; D003173:Complement C1s; D003171:Complement Pathway, Classical / Q000187:drug effects; D004492:Edetic Acid / Q000494:pharmacology; D004591:Electrophoresis, Polyacrylamide Gel; D004792:Enzyme Precursors / Q000302:isolation & purification / Q000378:metabolism*; D006801:Humans; D046911:Macromolecular Substances
D004792:Enzyme Precursors; D046911:Macromolecular Substances; D015922:Complement C1q; D004492:Edetic Acid; D003166:Complement Activating Enzymes; D015923:Complement C1r; D003173:Complement C1s