Kir2.3/KCNJ4 Blocking Peptide (#BLP-PC032) is the original antigen used for immunization during Anti-Kir2.3 (KCNJ4) Antibody (#APC-032) generation. The blocking peptide binds and ‘blocks’ Anti-Kir2.3/KCNJ4 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.