Anti-PSD95 antibodies detect the protein encoded by the gene DLG4, or 'discs large MAGUK scaffold protein 4' in humans. The 724-amino acid protein is a member of the MAGUK family the PSD95 antigen is a documented neuronal marker. The cellular localization is predicted to be cytoplasmic and membrane-associated. Anti-PSD95 antibodies detect the protein encoded by the gene DLG4, or 'discs large MAGUK scaffold protein 4' in humans. The 724-amino acid protein is a member of the MAGUK family the PSD95 antigen is a documented neuronal marker. The cellular localization is predicted to be cytoplasmic and membrane-associated.