NMNAT2 Blocking Peptide (#BLP-NR139) is the original antigen used for immunization during Anti-NMNAT2 Antibody (#ANR-139) generation. The blocking peptide binds and ‘blocks’ Anti-NMNAT2 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.