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Carotenoid synthesis inEscherichia coli,when transformed with plasmid containing a carotenoid gene cluster fromErwinia herbicola(pPL376), is regulated by RpoS. When the plasmid was transformed intoE. colimutants that wereoxyRminus, the intracellular carotenoid concentration dramatically increased from that observed in anoxyRplus allele. The higher carotenoid concentration in these mutants correlated...
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