While pH(c) is a very dynamic parameter in the normal life of yeast, genetically it is a tightly controlled cellular parameter. The coupling of pH(c) to growth rate is even more robust to genetic alteration. Changes in pH(c) control cell division rate in yeast, possibly as a signal. Such a signaling role of pH(c) is probable, and may be central in development and tumorigenesis.
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Orij et al. (2012) studied this question.
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