complete separation of the [ 3h ] ethylketocyclazocine [ ( 3h ] ekc ) specific binding ( kappa subtype ) from tritiated tyr-d-ala2-me-phe4-gly-ol5 enkephalin ( dago ) and tyr-d-ala2-l-leu5-enkephalin ( dala ) binding ( mu-and delta-subtypes , respectively ) was achieved by sepharose-6b chromatography and sucrose density gradient centrifugation of digitonin solubilized frog brain membranes .
C0525773
dago
C0014298
enkephalin