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Comparative effects of different inhibitors of tyrosine phosphatases on vacuolar fluxes. Effects of (a) 25 μM PAO and 25 μM 3,4 DP and (b) 50 μM DMHV and 100 μM bpv(phen) on the rate of loss of 86Rb+ from isolated guard cells. Rate constant (h−1) plotted against time of washout. Inhibitor added at zero time on graph (36 min after start, during the phase of vacuolar efflux). Each curve shows the means of four replicate strips, with SEM.
