Figure 1From: PK20, a new opioid-neurotensin hybrid peptide that exhibits central and peripheral antinociceptive effects Structure of PK20, a hybrid opioid-neurotensin decapeptide (H-Dmt-D-Lys-Phe-Phe-Lys-Lys-Pro-Phe-Tle-Leu-OH).Back to article page