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Medical Definition of Complement 4
1. The second component to react in the complement sequence. It is a beta-globulin with a sedimentation coefficient of 18.7, a molecular weight of 240,000 and a serum concentration of 430 micrograms/ml. It is activated by complement 1 and serves as a receptor for c2. (12 Dec 1998)
Lexicographical Neighbors of Complement 4
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