The C4d Complement fragment Monoclonal Antibody [LP69] - Fluorescein (FITC) from ImmuQuest Ltd. is a Mouse Monoclonal antibody to C4A, C4B, complement component 4B (Chido blood group), copy 2, and C4B_2. This antibody recognizes Human antigen. The C4d Complement fragment Monoclonal Antibody [LP69] - Fluorescein (FITC) has been validated for the following applications: Immunohistochemistry, and Immunohistochemistry - frozen.