the effects of intracerebroventricular injection of the delta-selective opioid peptides , dadl ( d-ala2-d-leu5-enkephalin ) and dplpe ( d-pen2-l-pen5-enkephalin ) , on spontaneous locomotor activity were investigated in mice using multi-dimensional behavioral analysis , based upon a capacitance system .
C0205753
opioid
C0014298
enkephalin