We're moving to rndsystems.com. Come with us!

After July 31, 2026, Tocris Bioscience products and services will no longer be available on this website; you will access all products and services on rndsystems.com. Create your R&D Systems online account today.

δ Opioid Receptor Peptides

Agonists

Cat. No. Product Name / Activity
1180 [D-Ala2]-Deltorphin II
Selective δ agonist peptide
1431 DPDPE
Selective δ agonist

Antagonists

Cat. No. Product Name / Activity
0820 ICI 174,864
δ selective peptide antagonist