Kv1.3/KCNA3 (extracellular) Blocking Peptide (#BLP-PC101) is the original antigen used for immunization during Anti-KV1.3 (KCNA3) (extracellular) Antibody (#APC-101) generation. The blocking peptide binds and ‘blocks’ Anti-Kv1.3/KCNA3 (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.