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. 2020 Nov 4;12(6):plaa055. doi: 10.1093/aobpla/plaa055

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© The Author(s) 2020. Published by Oxford University Press on behalf of the Annals of Botany Company.

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

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Figure 1. — Ascorbic acid biosynthesis by the L-galactose pathway in plants. Enzymes involved in L-galactose pathway are labelled in the circles, including (1) PGI: glucose-6-phosphate isomerase; (2) PMI: mannose-6-phosphate isomerase; (3) PMM: phosphomannomutase; (4) GMP: GDP-mannose pyrophosphorylase; (5) GME: GDP-mannose-3′,5′-epimerase; (6) GGP: GDP-L-galactose phosphorylase; (7) GPP: L-galactose-1-phosphate phosphatase; (8) GalDH: L-galactose dehydrogenase; (9) GalLDH: L-galactono-1,4-lactone dehydrogenase.