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. 2016 Jul 4;9:138. doi: 10.1186/s13068-016-0557-3

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© The Author(s) 2016

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. 3 — SDS-PAGE analysis for the expression of the cellulase genes in E. coli BL21 (DE3). Lane 1, total proteins from recombinant E. coli BL21 cells without IPTG induction; lane 2, total proteins from recombinant E. coli BL21 cells induced by IPTG for 4 h; lane 3, purified cellulase; M, protein molecular weight markers. a cel7482; b cel3623; c cel36