Thermo Fisher Scientific's CD21 Antibody is a Rabbit Polyclonal antibody. This antibody has been shown to work in applications such as: Immunocytochemistry, Immunohistochemistry, Immunohistochemistry - fixed, and Western Blot. The CD21 Antibody was generated using Cr2 as the antigen and it reacts with Homo Sapiens, Human, Mouse, and Rat.