Kir4.1/KCNJ10 (extracellular) Blocking Peptide (#BLP-PC165) is the original antigen used for immunization during Anti-Kir4.1 (KCNJ10) (extracellular) Antibody (#APC-165) generation. The blocking peptide binds and ‘blocks’ Anti-Kir4.1/KCNJ10 (extracellular) 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.