Complement C5 Convertase, Classical Pathway

C5 Convertase (C4b2a3b); Classical C5 Convertase; Classical Pathway C5 Convertase; C5 Convertase, Classical
A serine protease that cleaves multiple COMPLEMENT 5 into COMPLEMENT 5A (anaphylatoxin) and COMPLEMENT 5B in the CLASSICAL COMPLEMENT ACTIVATION PATHWAY. It is a complex of CLASSICAL PATHWAY C3 CONVERTASE (C4b2a) with an additional COMPLEMENT C3B, or C4b2a3b.