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BRET level variation upon OR1740 stimulation with various Helional concentrations. BRET measurements were performed using crude membranes from yeast cells coexpressing OR1740-Rluc and OR1740-EYFP or expressing OR1740-Rluc alone. Receptors were stimulated with various concentrations of Helional. Results are expressed as the relative variation in the BRET level at the various odorant concentrations. Data are representative of three independent experiments.
