Fig. 1.

cap operon promoter activity was measured in the wild-types, msaABCR mutants and msaB mutants of cap5 (a) and cap8 (b) in different growth phases (early, mid-, late- and post-exponential phases). The vector pCN58 containing luxAB without a promoter was used as a negative control. These results represent the means of three independent experiments. Error bars represent se. Student's unpaired t-test was used to compare the results of the wild-types to their respective mutants. ***P ≤ 0.001.