The Rabbit Anti-Human Complement C4 Monoclonal Antibody (CTJS-63) from Creative Biolabs is a Rabbit Monoclonal antibody to C4A. This antibody recognizes Homo Sapiens, and Human antigen. The Rabbit Anti-Human Complement C4 Monoclonal Antibody (CTJS-63) has been shown to work in the following applications: Immunohistochemistry.