GPR81/HCAR1 Blocking Peptide (#BLP-HR011) is the original antigen used for immunization during Anti-GPR81/HCAR1 Antibody (#AHR-011) generation. The blocking peptide binds and ‘blocks’ Anti-GPR81/HCAR1 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.