Characterization and Heterologous Expression of UDP-Glucose 4-Epimerase From a <i>Hericium erinaceus</i> Mutant with High Polysaccharide Production.

The dextran content of the control group showed an increasing trend in the first 4 days, while there was a decreasing trend on the fifth day, but it slowly increased and stabilized during the sixth to ninth days.

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Under the reaction conditions of T = 35°C, the enzymatic activity of UGE protein showed an initial increasing trend and then a decreasing trend with the increase in pH, and had the highest enzymatic activity at pH 6, while the enzymatic activity was basically lost when the pH was 10.0 and 11.0, respectively ( Figure 4C ) ( Supplementary Figure S2 ).

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