in addition to its similar selectivity to that of the cyclic enkephalins dpdpe and dplpe , the affinity of [ 3h ] dstbulet for delta sites ( kd = 2.9 nm ) is significantly better than that of [ 3h ] dpdpe ( kd approximately 10.5 nm ) or dplpe ( ki ( delta ) approximately 19 nm ) .
C0014298
enkephalins
C0525856
dpdpe