Figure 1

DSF-family signal production of Xcc.
(a) HPLC analysis of the compounds in fractions A–D extracted from the strain ΔrpfC culture supernatant. (b) The chemical structures of DSF, BDSF, CDSF and IDSF as determined by liquid chromatography-mass spectrometry and/or nuclear magnetic resonance analysis. (c) The proportions of DSF, BDSF, CDSF and IDSF produced by strain ΔrpfC supernatant in media YEB, NA, NYG and XOLN.