Fig. 4

a Change in CE15 gene expression (slce15A, slce15B, and slce15C) in S. linguale cells grown on xylose (blue), corn cob xylan (yellow), and corn cob biomass (green) normalized to growth on glucose (red). The RNA polymerase sigma factor rpoD (locus tag Slin_1987) served as reference gene. Error bars indicate the SEM of triplicate measurements. b Release of monosaccharides (arabinose, xylose, and glucose) after 24-h enzymatic hydrolysis of ball-milled corn cob using Ultraflo^®, without the addition of CE15 (white), or with the addition of SlCE15A (gray), SuCE15A (dotted), or SuCE15C (striped). Error bars represent the SEM of triplicate measurements