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Background: The transporter of glucose plays an important role in the fermentation of citric acid. In this research, a high-affinity glucose transporter (HGT1) was identified and overexpressed in industrial strain A. niger CGMCC 10142. The overexpressed-HGT1 strains were obtained to verify the glucose transporter functions with different promoters PglaA and Paox1.Result: The sugar contents and citric acid production during fermentation were tracked. As speculated, the HGT1-overexpressed strainsdoi:10.21203/rs.3.rs-105405/v1 fatcat:wqnfezgilvgutcblu6cv6cvcka