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Representative analyses of GFP expression by B. burgdorferi carrying chimeric PerpAB/PerpG::gfp transcriptional fusions. Bacteria were either grown to mid-exponential phase at a constant 23°C (shaded) or were shifted from 23 to 34°C after reaching mid-exponential phase (unshaded). Diagrams below each panel illustrate regions of the two erp promoter/operator regions contained in each construct.
