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. 2019 Nov 18;294(52):19978–19987. doi: 10.1074/jbc.RA119.011435

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© 2019 Mazurkewich et al.

Author's Choice—Final version open access under the terms of the Creative Commons CC-BY license.

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Figure 7. — OtCE15A in complex with xylobiose. Shown is the overall structure of OtCE15A, showing the two xylobiose-binding sites (PDB code 6SYU) highlighted in green and magenta (A) for the active site (B) and secondary site (C), respectively. The secondary site is ∼25 Å from the active site. D, a proposal of how the secondary xylobiose site could connect to the XUX found in the active site. Potential xylose moieties connecting the xylobiose observed in the second site to the XUX molecule observed in the active site are shown by orange hexagons. The region of the protein proposed to interact with lignin is colored in cyan.