KCNJ15/Kir4.2 Blocking Peptide (#BLP-PC058) is the original antigen used for immunization during Anti-KCNJ15 (Kir4.2) Antibody (#APC-058) generation. The blocking peptide binds and ‘blocks’ Anti-KCNJ15/Kir4.2 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.