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Enkephalin (2-D-Alanine-5-D-Leucine), [Tyrosyl-3,5-3H(N)]-, 250µCi (9.25MBq)

DADLE, tritiated on the tyrosyl group. Peptide sequence: Tyr-D-Ala-Gly-L-Phe-D-Leu. DADLE is a synthetic enkephalin analog considered selective for the delta opioid receptor, but has been shown to bind the mu opioid receptor as well.

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DADLE acts as an agonist at delta opioid receptors (DOR), but has also been shown to bind mu opioid receptors (MOR). These receptors are a group of GPCRs that are potential drug targets for pain and drug addiction.

We offer both agonist and antagonist radioligands for autoradiographic visualization or performing saturation and competition assays to determine receptor expression levels (Bmax), dissociation constants (Kd), association and dissociation rates (kon and koff), and inhibitor constants (Ki) for a variety of receptors. We develop our radioligands to the highest specific activity possible and provide high purity resulting in low non-specific binding products. Each of our ultra-pure radioligands is fully characterized for pharmacological action and validated in receptor binding assays.

Radiolabeled ligands remain the most sensitive method for probing receptor binding biology; yielding unprecedented sensitivity gives results that technicians and scientists can trust. For over 50 years, PerkinElmer has been a leading supplier of New England Nuclear (NEN) radiochemicals, liquid scintillation cocktails, vials and nuclear counting detection instruments.

References for NET648:

  1. Vošahlíková, M., Jurkiewicz, P., Roubalová, L. et al. (2014), High- and low-affinity sites for sodium in δ-OR-Gi1α (Cys351-Ile351) fusion protein stably expressed in HEK293 cells; functional significance and correlation with biophysical state of plasma membrane. Naunyn-Schmiedeberg's Arch Pharmacol, 387: 487.
  2. Bourova, L., Kostrnova, A., Hejnova, L., Moravcova, Z., Moon, H.-E., Novotny, J., Milligan, G. and Svoboda, P. (2003), δ-Opioid receptors exhibit high efficiency when activating trimeric G proteins in membrane domains. Journal of Neurochemistry, 85: 34–49.


Concentration 1.0 - 10 mCi/mL
Detection Method Radiometric
Label Position Nominally Labeled
Molecular Weight 569.7
Product Brand Name NEN Radiochemicals
Radioisotope H-3
Radionuclide 3H
Receptor Type Opioid
Shipping Condition Dry Ice
Special Ordering Information This is a radioactive product - shipping address must have a license to receive radioactive materials.
Therapeutic Area CNS & Neurologic, Pain, Inflammation
Unit Size 250 µCi
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Radiometric Reagents Guide 2010-2011

For over 50 years PerkinElmer has been a leading supplier of radiochemicals, liquid scintillation cocktails, vials and nuclear counting detection instruments. Today is no different. We have always been committed to providing you products for all of your radiometric needs and we are still committed t ...