Complement C3 Convertase, Alternative Pathway

**Definition:** A serine protease that is the complex of COMPLEMENT C3B and COMPLEMENT FACTOR BB. It cleaves multiple COMPLEMENT C3 into COMPLEMENT C3A (anaphylatoxin) and COMPLEMENT C3B in the ALTERNATIVE COMPLEMENT ACTIVATION PATHWAY.

**Tree numbers:** - D12.776.124.486.274.045.387.500.374

**Synonyms:** - C3 Convertase, Alternative Pathway - C3 Convertase (C3bBb) - Complement 3b-Associated Factor B-fragment Bb - Complement 3 Convertase, Alternative Pathway - Alternative Pathway C3 Convertase