Seyedsayamdost M, Cleto S, Carr G, Vlamakis H, Vieira M, Kolter R, Clardy J. Mixing and matching siderophore clusters: structure and biosynthesis of serratiochelins from Serratia sp. V4. J Am Chem Soc. 2012;134(33):13550–3. PMCID: PMC3424848