ABCB4/MDR3 Blocking Peptide (#BLP-MT023) is the original antigen used for immunization during Anti-ABCB4/MDR3 Antibody (#AMT-023) generation. The blocking peptide binds and ‘blocks’ Anti-ABCB4/MDR3 primary antibody, this makes it a good negative reagent control to help confirm antibody specificity in western blot and immunohistochemistry applications. This control is also often called a pre-adsorption control.