FIG. 2.

Transcription of msp in protease mutant strains. T. denticola strains were harvested at an OD₆₀₀ of 0.1, 0.2, and 0.3 and at stationary phase (fifth day). QRT-PCR was performed as described in the legend to Fig. 1. Data are shown with the gene expression level defined as 1.0 at an OD₆₀₀ of 0.1. Error bars represent standard deviations of the means of results from triplicate samples in two independent experiments.