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Dose-dependent inhibition of the carbachol-induced [Ca2+]i signal in Chinese hamster ovary (CHO)-K1 cells expressing muscarinic acetycholine receptor type 3 (mAchR3) (10·000 cells/well) by the AchR antagonist atropine (0·01–1000 μg/ml). RLU = relative light units. Shown are mean values (bars) ± standard deviation (s.d.) of four independently performed experiments.
