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Sucrose-positive derivatives of Escherichia coli K-12, containing the plasmid pUR400, and of Klebsiella pneumoniae hydrolyse intracellular sucrose 6-phosphate by means of an invertase into D-glucose 6-phosphate and free D-fructose. The latter is phosphorylated by an ATP-dependent fructokinase (gene scrK of an scr regulon) to D-fructose 6-phosphate. The lack(More)
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