Figure 3.

Dual luciferase assay with in vitro grown B. burgdorferi. Spirochetes were grown to either mid-logarithmic or stationary phase and the in vitro luciferase assay performed with 700 μM D-luciferin or 3.5 mM coelenterazine. All data are presented as mean normalized relative luciferase units ± standard deviation for biological triplicate samples. (A) Relative RlucBb units normalized to OD600. The data set for each growth condition was analyzed with a one-way ANOVA followed by Dunnett's multiple comparison test compared to B. burgdorferi expressing flaBp-rlucBb (+pCFA701) and Bonferroni's multiple comparison test to compare the same clone in the two growth phases. (B) Relative FlucBb units normalized to OD600 or 108 relative RlucBb units of the same sample. Each data set was square root transformed and analyzed with a one-way ANOVA followed by Dunnett's multiple comparison test compared to B. burgdorferi expressing flaBp-rlucBb (+pCFA701). Unless indicated, means were not significantly different from the control. Significant differences are indicated with asterisks (*p ≤ 0.05; **p ≤ 0.01; ***p ≤ 0.001; ****p ≤ 0.0001).