Differential stereochemical requirements of mu vs. delta opioid receptors for ligand binding and signal transduction: development of a class of potent and highly delta-selective peptide antagonists.
Proc Natl Acad Sci U S A. 1992 Dec 15;89(24):11871-5. doi: 10.1073/pnas.89.24.11871.
Proc Natl Acad Sci U S A. 1992.
PMID: 1334552
Free PMC article.