Figure 3

Change in sea gene copy number and sea -carrying phage copy number of S. aureus Mu50. The relative sea gene copy numbers and phage copy numbers in the mid-exponential, the transitional, the early stationary, and the late stationary growth phase of S. aureus Mu50 at different pH levels; black symbols are the relative sea gene copy numbers and white symbols are the relative phage copy numbers. At pH 4.5, the SEA values are after 10, 24 and 30 h of growth, shown in the figure as transitional, early stationary and late stationary phase samples, respectively. For pH 6.0 and 5.5, representative values of several independent batch cultures are shown.