Figure 8

The expression of acid resistance genes from TX01 under acidic conditions. The exponential phase of overnight cultures of TX01 were grown in normal LB medium at pH 7.0 and acidic medium at pH 5.5 for 1 h. The relative expression of cadB, cadA, cadBA, and cadC were determined by RT-qPCR. The fold difference derived from the values under acidic conditions compared with the values under normal conditions. Data are presented as the means ± SEM (N = 3). N, the number of times the experiment was performed. **, P < 0.01; *, P < 0.05.