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A typical active site of GH11 xylanases, here illustrated by Xyn11A from Trichoderma reesei RUT-C30, PDB 1XYO [98]. The amino acids are colored in accordance with subsite-numbering; -2: pink, -1: green, +1: orange, +2: red, and +3: purple. The catalytic residues are colored in yellow. (The color version of the figure is available in the electronic copy of the article).
