TABLE 2.

Numbers of genes that were detected (SNR, >3.0), induced (fold change, >2.0), and repressed (fold change, <0.5) when S. oneidensis MR-1 cells were exposed to pH 4.0 and pH 10.0 for 30 and 60 min^a

Probe	Parameter	pH 4		pH 10
		30 min	60 min	30 min	60 min
PCR	Detected gene no.	95 ± 0.7	92 ± 2.3	83 ± 2.5	89 ± 3.2
	Induced gene no.	35 ± 1.8	25 ± 2.7	2 ± 0.0	7 ± 01.2
	Repressed gene no.	5 ± 0.5	5 ± 0.6	76 ± 4.9	32 ± 3.7
70-mer	Detected gene no.	89 ± 5.3	79 ± 4.3	48 ± 2.7	66 ± 3.1
	Induced gene no.	38 ± 3.2	21 ± 2.5	2 ± 0.3	8 ± 1.6
	Repressed gene no.	6 ± 0.4	5 ± 0.6	42 ± 3.8	20 ± 2.1
60-mer	Detected gene no.	68 ± 5.4	65 ± 2.5	36 ± 3.0	52 ± 4.1
	Induced gene no.	39 ± 1.9	22 ± 3.7	0	10 ± 2.2
	Repressed gene no.	3 ± 0.5	3 ± 0.5	33 ± 3.8	13 ± 2.5
50-mer	Detected gene no.	69 ± 3.3	54 ± 5.0	25 ± 3.2	38 ± 4.1
	Induced gene no.	38 ± 2.1	21 ± 2.8	1 ± 0.0	5 ± 1.6
	Repressed gene no.	3 ± 0.5	2 ± 0.3	20 ± 2.3	13 ± 1.8

^aThe data were determined by using PCR amplicon or oligonucleotide arrays and are averages ± standard deviations for three slides with a total of six spots.