The class III ribonucleotide reductase from Neisseria bacilliformis can utilize thioredoxin as a reductant.

Wei Y, Funk MA, Rosado LA, Baek J, Drennan CL, Stubbe J
Proc Natl Acad Sci U S A. 2014 Sep 9;111(36):E3756-65. doi: 10.1073/pnas.1414396111. Epub 2014 Aug 25. PubMed Article

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