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The effect of exogenous riboflavin on AY decolorization. Values are means ± SD (n = 3). The cells were cultured in decolorization medium with (+) or without (–) adding 2 μM riboflavin. The initial AY concentration of is 200 mg/L. Significance analysis of decolorization rates of the same strain with and without riboflavin was performed using Student’s t-test; asterisks **p < 0.01, and NS indicates not significant.
