immunol a protein present in blood serum that, acting with complement, is involved in the destruction of alien cells, such as bacteria

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properdin in Medicine




A natural protein in human blood serum that participates in the body's immune response by working in conjunction with the complement system.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.