Scheme for the bacilysocin biosynthetic pathway. The biosynthetic steps represented by the circled numbers 1, 2, and 3 have been well elucidated in E. coli and B. subtilis (for a review, see reference 5) and are catalyzed by the enzymes CDP diglyceride synthase, phosphatidylglycerol-phosphate synthase, and phosphatidylglycerol-phosphate phosphatase, respectively.