C3 Convertase is an enzyme complex that plays a crucial role in the immune system, specifically in the complement system. It is responsible for cleaving the protein C3 into two fragments: C3a and C3b. This process is essential for amplifying the immune response and marking pathogens for destruction. There are two main forms of C3 convertase, known as C4b2a and C3bBb, which are formed through different pathways: the classical pathway and the alternative pathway, respectively. Both forms help enhance inflammation and opsonization, making it easier for immune cells to identify and eliminate foreign invaders.