Complement C4a
Synonyms
C4a Complement
C4a, Complement
Complement 4a
Complement Component 4a
Complement, C4a
Component 4a, Complement
The smaller fragment formed when complement C4 is cleaved by COMPLEMENT C1S. It is an anaphylatoxin that causes symptoms of immediate hypersensitivity (HYPERSENSITIVITY, IMMEDIATE) but its activity is weaker than that of COMPLEMENT C3A or COMPLEMENT C5A.