EBV p23 (residues 1-162) protein.Recombinant Epstein-Barr Virus protein contains the EBV(HHV-4) p23 fragment, amino acids 1-162.The protein is purified by proprietary chromatographictechnique.Epstein-Barr virus, frequently referred to as EBV, is amember of the gamma herpesvirus family and one of themost common human viruses. The virus occurs worldwide,and most people become infected with EBV sometimeduring their lives. It persists in B lymphocytes for the lifeof the host.EBV p23 is a viral late complex associated with virionparticles and consists of two gene products, BFRF3 (p18)and BLRF2 (p23).IgG to the viral capsid antigen appears in the acutephase, peaks at 2 to 4 weeks after onset, declines slightly,and then persists for life.;