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. 2021 May 31;118(23):e2019863118. doi: 10.1073/pnas.2019863118

Scheme 1.

Scheme 1.

Proposed mechanisms for the PsfC-catalyzed oxidative decarboxylation of 2-Pmm. Pathway A results from homolytic decarboxylation, whereas pathway B involves electron transfer from the radical intermediate to Fe(IV) and subsequent heterolytic decarboxylation.