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. Author manuscript; available in PMC: 2021 Oct 15.
Published in final edited form as: Chin J Chem. 2020 Sep 24;39(2):463–472. doi: 10.1002/cjoc.202000448

Figure 3.

Figure 3

A) Proposed biosynthetic pathways for (E)-5 formation through IsnA and IsnB catalyzed reactions. B) Using inverse-labeling feeding approach, the isonitrile carbon is originated from the carbonyl carbon (C2) of ribulose-5-phosphate.