Fig. 2

XynA–XBP chimera presenting the greatest positive modulation by xylose. a The sequence of the XynA–XBP271 chimera. Regions derived from XBP are shown in blue and those from XynA are shown in red. The number in parentheses indicates the amino acid number of the mature parental proteins. b Ribbon representation of the final model from molecular dynamics simulations of the XynA–XBP271 chimera. The structure of the xylose-bound XBP is shown in blue, and that from XynA is shown in red. The arrows indicate the xylanase insertion points in the XBP molecule. The active site and catalytic residues Glu78 and Glu172 in the xylanase domain are indicated