Figure 3

Cell growth and motility data from drop experiments. (a) Cell growth in drops, measured as GFP intensity per drop for Ca2+-free (white circles), CaLow (green diamonds), CaInt (blue square) and CaHigh (orange triangles); Fig. S2 provides a correlation of bacterial growth (measured as optical density) and GFP fluorescence. (b) Average swimming speed of cells in drops on days 0, 1, and 2 for Ca2+-free (white), CaLow (green), CaInt (blue) and CaHigh (orange) treatments. After day 2, the development of precipitates did not allow for reliable measurements of cell swimming speeds.