...receptors potently activated by an inert ligand. Proc Natl Acad Sci USA, 104 (12), 5163–5168. https://...and biological light sources for opsin activation. Proc Natl Acad Sci USA, 113 (3), E358–E367. https://doi.org...with a specifically designed Gi-coupled receptor. Proc Natl Acad Sci USA, 95 (1), 352–357. https://doi....G protein regulation of β cell function in vivo. Proc Natl Acad Sci USA, 106 (45), 19197–19202. https:...to be involved in a wide variety of biological processes, including initiating signaling pathways in inflammation...