conformational parameters of the opioid peptides dynorphin and [ leu5 ] enkephalin in dilute aqueous solution ( 3 x 10 ( -5 ) m ) were investigated by performing singlet-singlet energy transfer experiments with dynorphin and with the biologically active 4-tryptophan analogs of dynorphin- ( 1-13 ) and [ leu5 ] enkephalin at ph 5.5 and 8.0 .
C0205753
opioid peptides
C0013355
dynorphin