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Relative transcription of the xylose operon in B. licheniformis at different temperatures. The cultures were transferred to shakers at different temperatures after being cultured to the desired time point with the transcriptional activity subsequently assessed after 1 h. ■—■, OD600, ▄, relative expression. A, 25 °C; B, 30 °C; C, 37 °C; D, 42 °C. Results are expressed as mean of replicates, bars with *** represent statistically significant differences between groups at p < 0.01.
