TABLE 1.

EPS composition as a function of biofilm age and depth

Condition	Biofilm age (days)	Biofilm depth (mm)	Concna (mg/g dry wt) for:
			Polysaccharides	Proteins
Aerated biofilms	1	<0.2	5 ± 2	58 ± 7
	8	0.2	27 ± 7	210 ± 12
	8	0.4	78 ± 8	221 ± 8
	8	0.6	94 ± 8	193 ± 13
	12	0.2	15 ± 5	133 ± 11
	12	0.4	12 ± 3	79 ± 9
	12	0.6	38 ± 6	131 ± 12
	12	0.8	86 ± 11	119 ± 9
Nonaerated biofilms	4	<0.2	1.3 ± 0.6	14 ± 5

^aStandard deviations were obtained from three separate biofilms.