KCNH2/erg1 Blocking Peptide (#BLP-PC016) is the original antigen used for immunization during Anti-KCNH2 (erg1) Antibody (#APC-016) generation. The blocking peptide binds and ‘blocks’ Anti-KCNH2/erg1 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.