Medical Definition of Complement 4a
1.
Smaller fragment formed when c1s splits c4 into c4a and c4b. As an anaphylatoxin, c4a causes symptoms of immediate hypersensitivity but it has weaker activity than c3a or c5a.
Chemical name: Complement C4a
(12 Dec 1998)
Lexicographical Neighbors of Complement 4a
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