Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A protein in blood serum that participates in the body's immune response by working in conjunction with the alternative pathway of the complement system.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biochemistry A
protein in humanserum thatcomplements part of theimmune system
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[Probably pro– + Latin perdere, to destroy; see perdition + –in.]
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Examples
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The activation through the classical pathway requires C1q, the alternative pathway requires C3b, properdin, and serum factors B and D; and the lectin pathway requires binding carbohyrdate residues on the surface of the bacteria similar to C1q.
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