CACNA2D3/Cavα2δ3 (extracellular) Blocking Peptide (#BLP-CC103) is the original antigen used for immunization during Anti-CACNA2D3 (CaVα2δ3) (extracellular) Antibody (#ACC-103) generation. The blocking peptide binds and ‘blocks’ Anti-CACNA2D3/Cavα2δ3 (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.