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. 2020 Dec 30;14(6):2420–2434. doi: 10.1111/1751-7915.13745

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© 2021 The Authors. Microbial Biotechnology published by Society for Applied Microbiology and John Wiley & Sons Ltd.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Fig. 1 — Schematic representation of the AAA pathway separated into three parts: (1) the shikimate pathway (in grey), (2) the L‐TRP branch (in orange) and (3) the L‐TYR and L‐PHE branches (in green). Also shown is precursor availability through the glycolysis and pentose phosphate pathways as well as catabolism through the Ehrlich pathway and the erythritol pathway. The genes involved in the pathways are indicated next to the arrows representing the reactions. Dotted arrows represent multistep pathways, and bidirectional arrows indicate reversible reactions. PAC: phenyl acetaldehyde; 2PE: 2‐phenylethanol; 4OH2PE: 2‐(4‐hydroxyphenyl)ethanol; PAA: 2‐phenylacetate; and 4OHPAA: 2‐(4‐hydroxyphenyl)acetate.