KCNJ1/Kir1.1 Blocking Peptide (#BLP-PC001) is the original antigen used for immunization during Anti-KCNJ1 (Kir1.1) Antibody (#APC-001) generation. The blocking peptide binds and ‘blocks’ Anti-KCNJ1/Kir1.1 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.