Deltorphin also known as deltorphin A and dermenkephalin is a naturally occurring exogenous opioid heptapeptide and thus exorphin with the amino acid sequence Tyr-D-Met-Phe-His-Leu-Met-Asp-NH2. Along with the other deltorphins (such as deltorphin I and deltorphin II) and the dermorphins deltorphin is endogenous to frogs of the genus Phyllomedusa such as P. bicolor and P. sauvagei where it is produced in their skin and is not known to occur naturally in any other species.
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