The Complement 4d (C4d) (Acute Humoral Rejection Marker) Antibody from MyBioSource.com is a Mouse Monoclonal antibody to C4A, and C4B. This antibody recognizes Human antigen. The Complement 4d (C4d) (Acute Humoral Rejection Marker) Antibody has been shown to work in the following applications: ELISA, and Immunofluorescence.