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Serum from normal mouse (left) and mouse injected with bacteria (right) were subjected to SDS PAGE followed by western blot with 66250-1-Ig (CRP Antibody) at dilution of 1:500. Horseradish peroxidase conjugated protein A was used for signal developing instead of secondary antibody incubated at room temperature for 1.5 hours
C-reactive protein (CRP) is an acute-phase serum protein synthesized by the liver in response to interleukin-6 (IL-6) during inflammation. The name of CRP derives from its ability to react with the C polysaccharide of Streptococcus pneumoniae. CRP is an annular, pentameric protein that belongs to the pentraxin family of proteins. CRP displays several functions associated with host defense: it promotes agglutination, bacterial capsular swelling, phagocytosis and complement fixation through its calcium-dependent binding to phosphorylcholine. It is used mainly as a marker of inflammation.