Synapsin I/SYN1 Blocking Peptide (#BLP-NR014) is the original antigen used for immunization during Anti-Synapsin I (SYN1) Antibody (#ANR-014) generation. The blocking peptide binds and ‘blocks’ Anti-Synapsin I/SYN1 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.