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. 2023 Jan 10;13:1046260. doi: 10.3389/fmicb.2022.1046260

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Copyright © 2023 Dzofou Ngoumelah, Harnisch, Sulheim, Heggeset, Aune, Wentzel and Kretzschmar.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Photographs (week 3, top) and phase-contrast photomicrographs (week 7, bottom) of: (A,B) Methanosarcina barkeri, (C,D) Methanobacterium formicicum, and (E,F) Methanothrix soehngenii, grown in the BFS01 medium, bars indicate 10 μm.