Fig. 1From: Development of a strictly regulated xylose-induced expression system in StreptomycesSDS-PAGE analysis of S. avermitilis protein expression in 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) proteinBack to article page