NCIt definition : A human immunoglobulin G4 (IgG4) monoclonal antibody directed against terminal complement
protein C5, with potential anti-inflammatory activity. Upon administration, pozelimab
targets and binds to terminal complement protein C5, thereby blocking C5 cleavage
into pro-inflammatory components and preventing the complement-mediated destruction
of red blood cells (RBCs) as seen in paroxysmal nocturnal hemoglobinuria (PNH). C5,
a complement pathway protein, is expressed at high levels by the liver.;