supported by the National Key Research and Development Project of China(2016YFA0400903 to C.L.and2017YFA0505400 to P.S.);the National Natural Science Foundation of China(21825703 to C.L.and 31971152 to P.S.);the Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology(2018CXFX004)。
G protein-coupled receptors(GPCRs)are responsible for most cytoplasmic signaling in response to extracellular ligands with different efficacy profiles.Various spectroscopic techniques have identified that agonists exh...