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Styrolide BGC (top) with red arrows indicating transposon insertion sites of two Tn5‐mutants and BGC of acaterins (bottom). Acaterin (9) formation additionally requires 4,5‐didehydroacaterin reductase AcaR. StoB, StoC, StoD, and stoR are homologous to AcaA, AcaB, AcaC, and AcaR, respectively.
