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Fig. 2. Changes in AO fluorescence in response to (A) exposure of cells to
hypertonicity (1.6xisosmolarity) followed by restoration of isotonicity
and (B) exposure of cells to bafilomycin A1 (0.3 µmol l–1)
followed by the same exposure conditions as in A in the continuous presence of
bafilomycin A1. Data are means ± s.e.m. of 64–66 cells from three
to four independent preparations. Data were normalized to the mean calculated
from five points preceding the hypertonicity exposure. Dotted line corresponds
to normal quenching of AO (three independent preparations, 54 cells, data
normalized to the mean calculated from the first five points).