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The table shows intensity values from the integration of m/z peaks associated with the specific fengycin species, as obtained by RP-HPLC/ESI-MS. The two most abundant peaks, corresponding to double- and triple-charged ions, were used for the integration. Values are in nM, obtained by calibration using weighed and diluted aliquots of the Bacillus lipopeptide surfactin.
*Bacillus species were determined by sequencing 16S RNA encoding DNA, as specified in the Methods.
†The percentage of Agr inhibition was determined by dividing the 4-h value obtained in the luminescence assay for the sample (using 100 μl of culture filtrate) by that obtained for the control, and multiplying by 100.