38. Zha, Li; Jiang, Yindi; Henke, Matthew T.; Wilson, Matthew R.; Wang, Jennifer X.; Kelleher, Neil L.; Balskus, Emily P. Colibactin Assembly Line Enzymes Use S-Adenosylmethionine to Build a Cyclopropane Ring. Nat. Chem. Biol.2017, 13, 1063–1065. DOI: https://doi.org/10.1038/nchembio.2448.