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. 2016 May 20;5(1):695. doi: 10.1186/s40064-016-2328-9

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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.

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Fig. 1 — Proposed genetic organisation and regulation for the Rhizobium sp. RCI dehalogenase genes. R represents regulator gene that controls all three dehalogenases. P1 and P2 represent promoter regions of the structural genes, dehE, and dehD/dehL respectively. The arrows indicate sites of mutations. Original mutant lack the ability to express any of the three dehalogenase structural genes. Type 1 revertant regained the wild type ability to express all the three dehalogenase genes. Type 2 and 3 are constitutive for DehE and DehD/DehL respectively