This antibody is optimized to work with Biocare Medical’s PromARK™ detection products for animal tissues. CD20 antibody (P) is a 33 kDa leukocyte surface antigen consisting of four transmembrane regions and cytoplasmic N- and C-termini. CD20 is expressed primarily on B-cells but has also been detected on both normal and neoplastic T-cells. This gene encodes a B-lymphocyte surface molecule which plays a role in the development and differentiation of B-cells into plasma cells. CD20 has been tested and confirmed on multiple mammalian tissues including cat, dog, cow, pig, horse, sheep and human, but does not cross-react in mouse or rat tissues.