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. Author manuscript; available in PMC: 2016 Aug 28.
Published in final edited form as: Pharmacol Biochem Behav. 2015 Feb 28;132:49–55. doi: 10.1016/j.pbb.2015.02.022

Fig. 1.

Fig. 1

Place conditioning scores (change from baseline in sec) for the mu opioid agonist morphine and the mixed-action delta/mu glycopeptide MMP-2200. ** indicates significantly greater than saline (p ≤ 0.01).