Fig. 3From: Cumulative expression of heterologous XlnR regulatory modules and AraRA731V in Penicillium oxalicum enhances saccharification efficiency of corn stover and corn fiberHemicellulase, amylase activity analysis and protein content of five strains in complex carbon source medium. A–C Xylanase, pNPXase and amylase activities of five strains. D Extracellular protein content of five strains. Data represent mean ± SD from triplicate cultivations. Statistical significance of the differences between strains was calculated for transcriptional levels of endogenous genes. *p < 0.05, **p < 0.01, ***p < 0.001Back to article page