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Transcription from ftsZTB promoters P1-P4. Transcriptional fusions bearing P1 to P4 promoters upstream of the lux gene in pEM45 (pRM15 – pRM18) were transformed to M. tuberculosis (upper panel) and luciferase assays were carried out using exponentially growing cultures of the recombinant strains. Lux units were determined and normalized to OD600 units (lower panel).
