Fig. 1.

Population wide activation of the mutacin VI promoter of S. mutans UA159 by MIP. Reporter strain S. mutans 423p – gfp + was cultivated in BM medium supplemented with 0.5% glucose and 2.5 μM MIP (for induction of mutacin transcription). After 8 h of growth (37 °C, 5% CO₂) cells were observed under the fluorescence microscope. See Methods for further details