– TAT-GluR23A Fusion Peptide is a bioactive peptide comprising the GluR23A sequence—residues 869 to 877 of GluR23Y with alanine replacing tyrosine—and an 11 amino acid cell-permeable HIV Trans-Activator of Transcription (TAT) protein transduction domain (PTD). It serves as an inactive control counterpart to the glutamate receptor endocytosis inhibitor GluR23Y, devoid of crucial phosphorylation sites.