FunctionDisplays several functions associated with host defense: it promotes agglutination, bacterial capsular swelling, phagocytosis and complement fixation through its calcium-dependent binding to phosphorylcholine. Can interact with DNA and histones and may scavenge nuclear material released from damaged circulating cells.
Tissue specificityFound in plasma.
Sequence similaritiesBelongs to the pentaxin family. Contains 1 pentaxin domain.