Human ABCB1/MDR1 Blocking Peptide (#BLP-MT021) is the original antigen used for immunization during Anti-Human ABCB1/MDR1 Antibody (#AMT-021) generation. The blocking peptide binds and ‘blocks’ Anti-Human ABCB1/MDR1 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.