�ݺ�ߣ

Complementary proteins are secreted by the liver and present in blood serum. Some are encoded by MHCIII genes and act as zymogens, becoming active through proteolytic cleavage. They have several functions, including opsonization to help phagocytosis, forming the membrane attack complex that makes pores in cell membranes, and mediating inflammatory responses. Complementary proteins can be activated through the classical or alternative pathways.Read less