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Quinone effect on intracellular Ca2+ levels in A7r5 cells. Q7 blunted the release of calcium from intracellular stores, but not the influx of calcium from extracellular space. Representative plots of relative changes in Ca2+ signal (fluo-3 fluorescence) over time on A7r5 cells in calcium-free medium with 10−6 M phenylephrine (PE) in absence of Q7 (control) (a) or presence of 10−5 M Q7 (b). Data are the average ± SEM (n = 3).
