GFAP Blocking Peptide (#BLP-FP001) is the original antigen used for immunization during Anti-GFAP Antibody (#AFP-001) generation. The blocking peptide binds and ‘blocks’ Anti-GFAP 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.