Table 2.

Proteins identified in PA adapted gels by PMF, MS/MS

Spot Number	Protein Name	Protein Description [Origin Species selected by MASCOT]	Fold Change	p value	Mascot Score	Peptides Matched	Molecular Weight (Da)
1	CpxR	DNA-Binding transcriptional regulator [Shigella flexneri 5 str. 8401]	+5.01	0.02136	185	11	26274
2	RplE	50 S ribosomal subunit protein L5 [Salmonella enterica serovar Typhi str. CT18]	+5.84	0.03998	85	8	20362
3	RplF	50 S ribosomal subunit protein L6 [Salmonella enterica serovar Typhi str. CT18]	+6.09	0.04065	177	7	18905
4	SodA	Manganese superoxide dismutase [Escherichia coli O157:H7]	+7.51	0.01953	155	5	22886
5	Dps*	starvation/stationary phase DNA protection protein [Salmonella enterica serovar Typhi str. CT18]	-	-	482	12	18706

Table 2. Proteins in Table 2 are those with the highest and most statistically significant changes in protein expression following exposure to PA. Fold change is the level of change of each protein following PA adaptation. A Student's t test (performed by Melanie 5.0 gel analysis software) was used to determine the level of significance of expression values.

*As Dps was not detected by Melanie 5.0 in the unadapted control gels (for unknown reasons), no fold change or p value for this protein can be reported. This protein was selected for further study because of its prominence in PA adapted gels.