GIRK1/Kir3.1 Blocking Peptide (#BLP-PC005) is the original antigen used for immunization during Anti-GIRK1 (Kir3.1) Antibody (#APC-005) generation. The blocking peptide binds and ‘blocks’ Anti-GIRK1/Kir3.1 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.