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. 2017 Nov 30;10:292. doi: 10.1186/s13068-017-0975-x

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — Amounts of glucan (G) and xylan (X) released from solids during pretreatment (Stage 1) and biological digestion (Stage 2) for fungal enzymes and C. thermocellum after 168 h. Sugar release was normalized to 100 g of glucan plus xylan in the raw biomass for each respective Populus variety