CD56, M.W. 150,000, is expressed on approximately 10-25% of human peripheral blood lymphocytes. CD56 (NKH-1) is expressed on human peripheral blood natural killer cells, representing a pan NK-cell antigen. Expressed on non-MHC-restricted cytotoxic T cells. Exalpha's CD56, clone C5.9 has been recognized as the superior CD56 antibody for Flow Cytometry applications because of it's specific and intense staining. In fact, our CD56 is bright enough to be used in FITC! Now this antibody is proven to work in formalin fixed paraffin embedded section.Available concentrated, pre-diluted in dropper bottles, or conjugated to several flurochromes for manual use or automated applications.