dermorphin was tested for its relative affinity to mu- , delta- and chi-opioid receptors by determining its potency in displacing the selective mu-receptor ligand [ 3h ] tyr-dala-gly-mephe-gly-ol ( where gly-ol = glycinol ) , the prototypic delta-receptor ligand [ 3h ] tyr-dpen-gly-phe-dpen ( where dpen = beta , beta-dimethylcysteine ) and the chi ligand [ 3h ] ethylketocyclazocine from rat brain and/or guinea pig cerebellum membrane preparations .
C0034801
opioid
C0140057
delta-receptor