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Additional file 3: Figure S3. (A) Chitobiase activity and (B) optical density (600 nm) of S. lividans XCPR after 48, 72, and 96 h cultivation. After 48 h, D-xylose was added to a final concentration of 0.0, 0.5, 1.0, and 2.0%. Cultivation was continued for 24 and 48 h (72 and 96 h total).

Additional file 2: Figure S2. SDS-PAGE gels of S. avermitilis protein expression profiles for (A) cell extracts and (B) culture supernatants: 1.0% 1. Glycerol, 2. D-glucose, 3. D-xylose, 4. D-galactose, 5. D-fructose, and 6. no sugar. M: molecular weight marker. Arrows indicate Xylose isomerase (XylA) protein.

Additional file 1: Figure S1. SDS-PAGE gels of S. avermitilis protein expression profiles for (A) cell extracts and (B) culture supernatants: 2.0% 1. Glycerol, 2. D-glucose, 3. D-xylose, 4. D-galactose, 5. D-fructose, and 6. no sugar. M: molecular weight marker. Arrows indicate Xylose isomerase (XylA) protein.

Additional file 4: Figure S4. Gene organization in the xyl operon of S. avermitilis MA-4680, S. coelicolor A3 (2), S. lividans 1326, and S. griseus (NBRC 13350) [22, 28, 29, 30].