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Preparative RP-HPLC-DAD spectrum at 220 nm of the 80% MeCN SPE eluate of S. turgens. HPLC fractions displaying antibacterial activity are shown in boxes below the chromatogram and peak fractions containing antibacterial peptides are marked with arrows. The blue line shows the linear gradient (5-60%) of acetonitrile (MeCN) dissolved with 0.1% formic acid (FA). Note: RP— reversed-phase; HPLC—high performance liquid chromatography; DAD—diode array detector; SPE—solid phase extraction.
