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Promoter analysis was performed on the Rhizopus niveus 3-phosphoglycerate kinase 2-encoding gene (pgk2), one of the two pgk genes (pgk1 and pgk2) from this filamentous fungus sequenced so far. Deletion mutants of the promoter region were fused to the Escherichia coli uidA gene (which codes for β-glucuronidase; GUS), and introduced into R. niveus to measure the intracellular GUS activities of the...