title: Endogenous ligands and inverse agonism.
mesh_terms: D019204:GTP-Binding Proteins / Q000378:metabolism*; D008024:Ligands; D011956:Receptors, Cell Surface / Q000187:drug effects* / Q000378:metabolism
chemical_list: D008024:Ligands; D011956:Receptors, Cell Surface; D019204:GTP-Binding Proteins