pro·per·din (prō-pûr'dn) n. 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.
[Probably pro-1 + Latin perdere, to destroy; see perdition + -in.]
Main Entry: pro·per·din Pronunciation: prO-'p&rd-&n Function: noun : a serum protein that participates in destruction ofbacteria, neutralization of viruses, and lysis of red blood cells
properdin pro·per·din (prō-pûr'dn) n. A natural protein in human blood serum that participates in the body's immune response by working in conjunction with the complement system.