Table 2. Proteins indicating different expression levels in 48-h aged biofilms and planktonic cells.

Spot no.	MW	pI	gene	Protein	Locus tag	Fold-change
102	27.8	4.4	ahpC	peroxiredoxin	AOLE_13380	Ha
8202	34.7	6.8	dho	dehydrogenase	AOLE_09905	H
204	37.9	4.3	etfA	electron transfer flavoprotein subunit alpha	AOLE_04180	H
5605	62.2	5.5	gabD	NADP-dependent aldehyde dehydrogenase	AOLE_06655	16.2
1804	92.2	4.7	fepA	TonB-dependent receptor	AOLE_09880	9.4
1904	104	4.7	cirA	TonB dependent receptor family protein	AOLE_02770	8.7
3304	42.9	5.1	mdh	malate dehydrogenase	AOLE_02365	2.7
4008	22.9	5.2	nudF	ADP-ribose pyrophosphatase	AOLE_04965	2.5
5709	74.5	5.4	hutU	urocanate hydratase	AOLE_00355	2.3
2005	16	4.9	pilH	protein pilH	AOLE_03150	2.1
2606	60.8	4.9	atpD	F0F1 ATP synthase subunit beta	AOLE_18565	1.9
6410	51.6	5.9	adh	putative alcohol dehydrogenase	AOLE_06670	1.9
1101	28.9	4.6	gpx	glutathione peroxidase	AOLE_18550	1.8
205	38.3	4.5	etfA	electron transfer flavoprotein subunit alpha	AOLE_04180	1.7
1006	16.2	4.7		hypothetical protein	AOLE_15935	1.6
6504	59.3	5.7	fumC	fumarate hydratase	AOLE_07235	1.5

^a‘H’ indicates proteins that were exclusively detected in biofilm cells.