in a titrable manner , the fab fragments noncompetitively inhibited the binding of the mu selective peptide , [ 3h ] [ d-ala2 , mephe4 , 2gly-ol5 ] enkephalin ( dago ) and the delta selective peptide , [ 3h ] [ d-pen2 , d-pen5 ] enkephalin ( dpdpe ) , to neural membranes .
C0014298
enkephalin
C0525856
dpdpe