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Influence of temperature on leukotoxin transcription. SH2020 was grown at 42°C (filled squares) or at 30°C (open circles) until mid-log phase and then shifted to 42°C. CAT assays were performed on samples taken post temperature upshift. The data points represent averages of two samples, and error bars indicate 1 standard deviation. OD600, optical density at 600 nm.
