Activation of the complement system.
D000494:Allosteric Regulation; D001665:Binding Sites; D002118:Calcium; D002462:Cell Membrane; D002633:Chemotaxis; D003165:Complement System Proteins; D004789:Enzyme Activation; D004798:Enzymes; D005341:Fibrinolysin; D006461:Hemolysis; D006636:Histamine Release; D008274:Magnesium; D009504:Neutrophils; D010447:Peptide Hydrolases; D010587:Phagocytosis; D011485:Protein Binding
D004798:Enzymes; D003165:Complement System Proteins; D010447:Peptide Hydrolases; D005341:Fibrinolysin; D008274:Magnesium; D002118:Calcium