This reagent enables an estimation of non-specific binding of rabbit polyclonal antibodies to cell surface components in peripheral blood and tissue. Suitable for whole blood, Ficoll-separated preparations, frozen and paraffin embedded sections.This polyclonal antibody does not react with any antigen. It is a purified IgG. It was purified from serum collected from a rabbit prior to immunization. No reactivity with cell surface antigens on human.