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Kinetics of bactericidal activity of mPE against S. mutans. A total of 2.5 × 103 CFU was incubated at 37°C with increasing concentrations of mPE. Aliquots were removed and plated at the times indicated. The reactions were terminated by dilution in PBS. Samples were plated on BHI agar and incubated overnight. Results are presented as the percentage of viable colonies remaining after treatment.
