Table 4.

Summary of the differentially abundant proteins between xylan and xylose identified in the stationary phase cytosolic proteome.

Spot	Protein	Locus	Function i	Expect. ii	pI	kDa	Fold-Change iii	p Value
C1135	Amino acid ABC transporter substrate-binding protein	Bpr_I1826	T	5.8 × 10−4	4.0	31.6	Xylan	n/a
C785	Aminotransferase DegT/DnrJ/EryC1/StrS family	Bpr_I2311	I	1.5 × 10−10	5.0	51.0	4.2 ± 1.1	0.001
	Xylulokinase, XylB	Bpr_I0173	C		4.9	53.7
C1120	β-Galactosidase, Bga35B	Bpr_I2006	C	1.9 × 10−27	4.9	83.2	4.5 ± 0.8	0.001
	β-Xylosidase, Xyl3A	Bpr_I0184	C		4.8	78.2
C704	Hypothetical protein	Bpr_I2455	H	7.6 × 10−22	4.7	47.7	2.3 ± 0.1	0.001
	Phosphoribosylamine-glycine ligase, PurD	Bpr_I0870	O		4.7	46.3
C601	Oligopeptide ABC transporter substrate-binding protein, OppA1	Bpr_I1276	T	1.9 × 10−13	4.0	83.1	2.3 ± 0.5	0.001
C784	Peptidase U62 family	Bpr_I2456	P	6.1 × 10−9	4.8	52.3	14.7 ± 4.6	0.001
C1074	Sugar ABC transporter substrate-binding protein	Bpr_I0182	T	7.6 × 10−7	4.12	63.3	Xylan	n/a
C1057	Xylose ABC transporter substrate-binding protein	Bpr_I1173	T	9.6 × 10−12	4.2	38.4	−3.9 ± 1.1	0.001

ⁱ C, Carbohydrate metabolism; H, Hypothetical; I, Cell envelope; O, Nucleotide metabolism; P, Protein fate; T, Transporters; ⁱⁱ Expectation value is the statistical probability of the top ranked protein match being a false positive identification, p < 0.05; ⁱⁱⁱ Fold-change was calculated as the ratio of the mean normalized protein spot volumes in the xylan versus xylose growth conditions as stated. Positive values denote proteins with increased mean normalized spot volume in xylan grown cells. “Xylan” denotes the protein was uniquely detected in culture medium harvested from xylan grown cells. In these cases it was not possible to calculate a p Value and “n/a” (non-applicable) is entered.