[D-Pen2,4'-125I-Phe4,D-Pen5]enkephalin: a selective high affinity radioligand for delta opioid receptors with exceptional specific activity.
Richard J. Knapp, Shikha Sharma, Géza Tóth, Minh Thắng Dương, Lei Fang, C L Bogert, Steven Weber, Mary Hunt, Thomas P. Davis, James K. Wamsley
Abstract