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(A) Scheme showing the screening of unnatural 5- or 6- halogenated cis-indole isonitrile by CFPS for FamC1 or FisC plasmids in the presence of FamD2. (B) Structure of the halogenated cis-indole isonitrile -5-fluoro- 9, 6-fluoro- 10, 6-chloro- 11, 5-bromo- 12, 6- bromo- 13, and 5-iodo-cis-isonitrile 14 are shown.
