In vivo evidence for spinal delta-opiate receptor operated antinociception.
D000818:Animals; D020881:Enkephalin, D-Penicillamine (2,5)-; D004745:Enkephalins / Q000494:pharmacology; D008297:Male; D009619:Nociceptors / Q000502:physiology*; D010146:Pain / Q000503:physiopathology*; D051381:Rats; D011919:Rats, Inbred Strains; D011957:Receptors, Opioid / Q000187:drug effects / Q000502:physiology*; D017465:Receptors, Opioid, delta; D013116:Spinal Cord / Q000187:drug effects / Q000502:physiology*
D004745:Enkephalins; D011957:Receptors, Opioid; D017465:Receptors, Opioid, delta; D020881:Enkephalin, D-Penicillamine (2,5)-