Det större fragmentet som bildas när C3-konvertas spjälkar C3 i C3a och C3b. Såväl på den klassiska som den alternativa vägen deltar C3b i immunbindning och förstärker fagocytosen. Det bildar även ett cellulärt mellanled som fortsätter komplementprocessen. På den alternativa komplementvägen initierar C3b en positiv återkopplingsverkan av C3Pas.
The larger fragment generated from the cleavage of COMPLEMENT C3 by C3 CONVERTASE. It is a constituent of the ALTERNATIVE PATHWAY C3 CONVERTASE (C3bBb), and COMPLEMENT C5 CONVERTASES in both the classical (C4b2a3b) and the alternative (C3bBb3b) pathway. C3b participates in IMMUNE ADHERENCE REACTION and enhances PHAGOCYTOSIS. It can be inactivated (iC3b) or cleaved by various proteases to yield fragments such as COMPLEMENT C3C; COMPLEMENT C3D; C3e; C3f; and C3g.
Inga svenska synonymer finns.
C3b, Complement — Complement Component 3b — Component 3b, Complement — C3b Complement — Complement, C3b — Complement 3b — Inactivated C3b — C3b, Inactivated — iC3b — C3bi