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Fig. 2. Cytosolic pH change and patterning. (A,B) Cells were grown in atmospheric
oxygen or (C,D) 100 % O2. (A,C) Fluorescence intensity obtained by
confocal microscopy; excitation at 488 nm and 510-550 nm band pass filter.
(B,D) Transmitted light. (E,F) Fluorescence intensity averaged over the
vertical direction in the indicated boxes. Low fluorescence intensity in the
inner-zone cells suggests acidification of their cytosolic pH.
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