Table 2. Differentially expressed proteins identified from Y. pestis at 26°C.

Protein number	Protein name	Accession No.	Function	Method	Fold change
					WT/ΔrelAΔspoT
1	PanC (pantoate–beta-alanine ligase)	y0785	biosynthesis of cofactors, carriers: pantothenate	MALDI	7.3
2	hypothetical protein	y2262	putative	MALDI	15.2
3	S-ribosylhomocysteinase	y0888	catalyzes the hydrolysis of S-ribosylhomocysteine to homocysteine and autoinducer-2	MALDI	8.6
4	MetG (methionyl-tRNA synthetase)	y2648	aminoacyl tRNA synthetases, tRNA modification	MALDI	2.7
5	PyrE (orotate phosphoribosyltransferase)	y0096	pyrimidine ribonucleotide biosynthesis	MALDI	2.5
6	PyrB (aspartate carbamoyltransferase catalytic Subunit)	y0161	pyrimidine ribonucleotide biosynthesis	MALDI	3.6