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Plots illustrating the mean current densities through the different Ca2+ channel types (noted on the ordinates) measured in PCs dissociated from wild-type (white circles) or tottering (black circles) animals from the ages shown on the abcissae. Error bars represent standard errors of the mean (n = 4–21 cells/point; *, p<0.001, §, p<0.01, ¥, p<0.05).
