TY - RPRT TI - The Meta-Position of Phe4 in Leu-enkephalin Regulates Potency, Selectivity, Functional Activity, and Signaling Bias at the Delta and Mu Opioid Receptors AU - Cassell, R. J. AU - Sharma, K. K. AU - Su, H. AU - Cummins, B. R. AU - Cui, H. AU - Mores, K. L. AU - Altman, R. A. AU - van Rijn, R. M. PY - 2019 DO - 10.1101/750794 UR - https://www.biorxiv.org/content/10.1101/750794v1 ID - 10.1101/750794 ER -