Fig 3.

Variations in pre-rRNA and rRNA levels during E. coli growth. (A) Changes in mature rRNA, pre-rRNA, and their ratio were measured in overnight cultures that were subsequently inoculated into fresh MH growth medium and incubated for 7 h at 37°C. (B) Comparison of the mature/pre-RNA ratio and growth rate during different phases of growth. The growth rate curve is a weighted average determined from the change in CFU during each 30-min time period. Error bars estimated the standard deviations.