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Bioluminescence recordings in mouse SCN explants. A, Recordings of Per1-luc signals. The explants were cultured in 0 or 1.8 mm (control) Ca2+. B, Recordings of PER2:LUC expression. Explants were cultured in 0 or 1.8 mm Ca2+. C, Recordings of PER2:LUC expression. Explants were cultured in DMSO control (0.3%) and BAPTA-AM (20 or 80 μm).
