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. 2022 Apr 25;13:867342. doi: 10.3389/fmicb.2022.867342

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Copyright © 2022 Gendron and Allen.

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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Structures of modified F₄₃₀s. The structures of the modified F₄₃₀s in ANME-1 and Ca. E. thermophilum are confirmed based on NMR and/or crystal structures while the modifications in select methanogens are proposed based on mass spectrometry data.