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. 2020 Dec;33(2):190–217. doi: 10.1017/S0954422419000301

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© The Authors 2020

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2. — The two main pathways of aerobic ergothioneine (ERG) biosynthesis, noting the relevant enzymes and thumbnails of three-dimensional structures where known. SAM, S-adenosyl methionine. For a colour figure, see the online version of the paper.