The preference of putative pro-enkephalins for different types of opiate receptors.

Animals Benzomorphans/analogs & derivatives,pharmacology Brain/metabolism Drug Tolerance Dynorphins Endorphins/metabolism Enkephalin, Leucine-2-Alanine Enkephalin, Methionine/analogs & derivatives Enkephalins/metabolism,pharmacology Fentanyl/pharmacology Guinea Pigs Ileum/metabolism Male Mice Morphine/pharmacology Protein Precursors/metabolism Rats Receptors, Opioid/drug effects,metabolism Vas Deferens/metabolism

Benzomorphans Endorphins Enkephalins Protein Precursors Receptors, Opioid MR 2034 Enkephalin, Methionine Enkephalin, Leucine-2-Alanine alpha-neoendorphin enkephalin-Met, Arg(6)-Phe(7)- Dynorphins Morphine MRZ 2549 Fentanyl