Dinitrophenyl (DNP) is a hapten that is not normally expressed in the target tissue. Therefore, anti-DNP antibody has no relevant specificity to a target antigen, and can be used as isotype control antibody to differentiate non-specific background signal from specific antibody signal in various in vitro and in vivo studies. FITC-Labeled Human IgG1 Kappa Isotype Control (mAb) was purified from HEK293 cell culture. It is the FITC labeled form of Human IgG1 Kappa Isotype Control (mAb) (Cat. No. DNP-M2) .