Table 4.

Fold changes of transcripts of gadX and btuB attribute to different pH medium (pH 5.5/pH 7.4) from early stationary phase.

Gene	Fold increase a
gadX	1.43 ± 0.07
btuB	0.57 ± 0.13

^a Experiments were performed in triplicate and the data are presented as mean values ± SD.