HCN1 Blocking Peptide (#BLP-PC056) is the original antigen used for immunization during Anti-HCN1 Antibody (#APC-056) generation. The blocking peptide binds and ‘blocks’ Anti-HCN1 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.