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The metal-responsive smt operator/promoter region of Synechococcus PCC7942 was fused to the luxCDABE genes of Vibrio fischeri. Plasmid DNA (pJLE23) carrying this fusion conferred metal ion-inducible luminescence to transformed cyanobacteria. Synechococcus PCC7942 (pJLE23) was sensitive to ZnCl2 concentrations within a range of 0.5-4 microM as demonstrated by induction of luminescence. Trace levels of CuSO24 and CdCl2 were also detected.
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Erbe et al. (1996) studied this question.
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