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Effects of daidzein and genistin on If. Upper panel shows a current trace on the chart recorder. The double pulse protocol shown in the inset was repeated every 20 s. The filled and open bar above the trace indicate an application of 500 μM daidzein and 500 μM genistein, respectively. The lower panel shows original current recordings obtained at the points indicated in the upper panel. The dotted line indicates the zero current level.
