Immunogen sequence: CEKKLGTVIT PDTWKDGARN TTESGGRKLN ENKALTSKKA RFDPYGKNKF STCRICKSSV HQPGSHYCQG C Highest antigen sequence identity to the following orthologs: Mouse - 99%, Rat - 99%. Involved in the cytoskeletal anchoring of DLG4 in excitatory synapses