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. 2023 Sep 7;9(9):907. doi: 10.3390/jof9090907

Figure 4.

Figure 4

Enzymatic reactions and biosynthetic pathways for the formation of rare monosaccharides in yeasts. The synthetic pathways with the green background have not been reported in yeasts but have been realized in enzymatic reactions. XI: xylose isomerase; CDT: cellobiose transporter; GH: β-glucosidase; XR: xylose reductase; GDH: galactitol dehydrogenase; l-AI: l-arabinose isomerase; DPE: d-psicose 3-epimerase; A6PE: d-allulose 6-phosphate epimerase; A6PP: d-allulose 6-phosphate phosphatase; A6P: psicose 6-phosphate; TG6P: tagatose 6-phosphate.