– C-reactive protein (CRP) is a polypeptide molecule belonging to the family of pentraxins. CRP is synthesized primarily by the liver in response to certain pro-inflammatory cytokines. It plays an important role in innate immunity, opsonization by its properties, complement activation and immunoglobulins receptor binding. CRP is a protein of the acute systemic inflammation and is, therefore, a prime marker of inflammation.The CRP is quantified by immunonephelometry or immunoturbidimetry. C-Reactive Protein /CRP Protein, Human, Recombinant (His) is expressed in HEK293 mammalian cells with N-His tag. The predicted molecular weight is 24.1 kDa and the accession number is P02741-1.