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. 2017 Aug 15;12:47. doi: 10.1186/s40793-017-0260-4

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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. 2 — Morphological features. Transmission (a) and scanning (b) electron micrographs of a cell of strain Hulk grown with formate as the electron donor and Fe(III) citrate and sulfate as the electron acceptors, respectively. Arrow in (a) points at the lophotrichous flagella and in (b) at membrane vesicles. Scale bars, 200 nm