Delta (Phospho) Sleep Inducing Peptide (DSIP-P), a peptide that promotes sustained sleep, elicits alterations in circadian locomotor activity in rats [1] [2] [3].

δ-Sleep Inducing Peptide acetate, a neuropeptide, exhibits antioxidant and anxiolytic properties [1] [2].

δ-Sleep Inducing Peptide (DSIP) is a neuropeptide, with antioxidant and anxiolytic properties.

(D-Ser2)-Leu-Enkephalin-Thr is a delta selective agent of opioid receptor and shows analgesic effects.

Leuphasyl TFA is an amid peptide, a δ-opioid receptor agonist, is a degradation resistant long-acting Leu-enkephalin analog used to study the signaling pathway of delta opioid receptors. Leuphasyl TFA is a potent, long-acting Leu-enkephalin analog that is resistant to enzymatic degradation

Deltakephalin is a synthetic, potent specific opiate delta receptors agonist.

[D-Ala2]leucine-enkephalin acetate ([D-Ala2]leucine-enkephalin acetate (64963-01-5 free base)) is a delta opioid agonist used to study the signaling pathway of delta opioid receptors.

Tyr-Gly-Gly-Phe-Met-OH (Met-Enkephalin), is a naturally occurring, endogenous opioid peptide that inhibits tumor growth via binding to the opioid receptor.

[D-Ala2]-Leucine enkephalin is a delta opioid agonist used to study the signaling pathway of delta opioid receptors.

JTP10-△-TATi TFA is a selective inhibitor of JNK2 peptide (IC50: 92 nM), exhibiting 10-fold selectivity for JNK2 over JNK1 and JNK3.

JTP10-△-R9 TFA is a selective inhibitor of JNK2 peptide (IC50: 89 nM), exhibiting 10-fold selectivity for JNK2 over JNK1 and JNK3.

Dynorphin A TFA, an endogenous opioid peptide, plays a role in inhibitory neurotransmission within the central nervous system (CNS). It acts as a highly potent kappa opioid receptor (KOR) agonist and also stimulates other opioid receptors, including mu (MOR) and delta (DOR). Furthermore, Dynorphin A TFA has been observed to induce neuronal death, making it a significant subject in neurological disease research [1] [2].

H-Ser-Tyr-OH, a dipeptide comprising serine and tyrosine (incorrectly described as consisting of glutamic acid, glycine, and histidine), exhibits a significant capability to form a copper(II) complex with copper ions, enhancing its strong free radical scavenging activity. Furthermore, this compound has been shown to elevate the intracellular uptake of the delta opioid receptor ligand deltorphin [1].