The growth advantage in stationary-phase phenotype conferred by rpoS mutations is dependent on the pH and nutrient environment.

Abstract excerpt

Escherichia coli cells that are aged in batch culture display an increased fitness referred to as the growth advantage in stationary phase, or GASP, phenotype. A common early adaptation to this culture environment is a mutant rpoS allele, such as rpoS819, that results in attenuated RpoS activity. However, it is important to note that during long-term batch culture, environmental conditions are in flux. To date,...

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