GRIK3/GluK3 (extracellular) Blocking Peptide (#BLP-GC040) is the original antigen used for immunization during Anti-GRIK3 (GluK3) (extracellular) Antibody (#AGC-040) generation. The blocking peptide binds and ‘blocks’ Anti-GRIK3/GluK3 (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.