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The genes encoding phosphoglucose isomerase (fruI) and fructokinase (fruK) of Lactobacillus fermentum NRRL-B-1932 were sequenced. They constituted an operon, which is involved in fructose metabolism of this strain by channeling intracellular fructose into the phosphoketolase pathway. A third open reading frame, unkR, upstream of the operon was identified as homologous to genes of LacI/GalR family...
A mutant of Leuconostoc pseudomesenteroides ATCC12291 that was unable to grow on fructose was constructed by chemical mutagenesis. The fructose uptake of this mutant, designated as BPT143, was unaltered and allowed fructose still to be converted into mannitol when glucose was present in the growth medium. The mutant grew and consumed fructose faster than the parent strain when grown in a medium containing...
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