Novel cyclic peptide that disrupts interaction between GluK2 (formerlyy GluR6) and the postsynaptic density protein 95 (PSD-95). Competes with the C-terminus of GluK2 for binding to the PDZ1 domain of PSD-95. Inhibits clustering of kainate receptors. Please refer to IUPHAR Guide to Pharmacology for the most recent naming conventions. MW (observed): 819.95.