FIG. 2.

Effects of growth phase and medium on the thermoregulation of gene expression for amino acid, carbohydrate, and iron utilization genes. The bars indicate relative levels of expression measured in the wild-type strain DL1504 in M9 glycerol medium in exponential phase (M9 glyc), M9 glycerol medium in stationary phase (M9 glyc stat), M9 glucose medium in exponential phase (M9 gluc), and LB medium in exponential phase (LB). Relative levels of expression are expressed in comparison to the wild-type strain grown in M9 glycerol medium at 37°C. A bracket indicates a statistically significant difference in expression levels based on temperature under the given condition and is accompanied by the ratio of expression (37°C/23°C). Error is expressed as ±1 standard deviation from the mean.