<unk> , often simply called<unk> , is a protein of the immune system. It plays a central role in the complement system and contributes to innate immunity. In humans it is encoded on chromosome 19 by a gene called<unk> .
Complement component 3
Complement component 4
Complement component 5a
Complement receptor 1
Major basic protein
Neutrophil elastase
Macrophage-activating factor
Immunophilins