GRIK4/KA1 (extracellular) Blocking Peptide (#BLP-GC041) is the original antigen used for immunization during Anti-GRIK4 (KA1) (extracellular) Antibody (#AGC-041) generation. The blocking peptide binds and ‘blocks’ Anti-GRIK4/KA1 (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.