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Oxygen consumption (methylene blue decolorization) in cultures during adaptation to dormancy. Methylene blue (9 μg/ml) was added to dormancy model cultures before they were sealed. The optical density at 600 nm was measured every 2 h during the critical period between day 3 and day 6 after the start of the experiment. The values are the averages of four experiments. Squares, H37Rv; triangles, DorKO; circles, DorCO.
