SCN4B/Navβ4 (extracellular) Blocking Peptide (#BLP-SC044) is the original antigen used for immunization during Anti-SCN4B (NaVβ4) (extracellular) Antibody (#ASC-044) generation. The blocking peptide binds and ‘blocks’ Anti-SCN4B/Navβ4 (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.