Bio-Rad (Formerly AbD Serotec)'s MOUSE ANTI CANINE CD21 is a Mouse monoclonal antibody. It reacts with Canine, Feline, Horse, and Other Mammalian. This antibody has been shown to work in applications such as: Histology, Flow Cytometry, Immunohistochemistry, Immunohistochemistry - frozen, and Immunoprecipitation.