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Bistability during the development of competence.
A. The construction (BD2711) used to demonstrate bistability. The arrows represent positive regulation.
B. The frequency distributions of fluorescence intensities in cells carrying comK-gfp (strain BD2711) are plotted at various times during the development of competence. T0 refers to the time of departure from exponential growth. At each time point, the fluorescent intensities of 500 cells were evaluated.
