Thermo Fisher Scientific's Complement C4b Antibody is a Rabbit Polyclonal antibody. This antibody has been shown to work in applications such as: Western Blot. The Complement C4b Antibody was generated using C4B, complement component 4B (Chido blood group), copy 2, and C4B_2 as the antigen and it reacts with Homo Sapiens, and Human.