4COJ:
reference: The Crystal Structure of Thermotoga maritima Class III Ribonucleotide Reductase Lacks a Radical Cysteine Pre-Positioned in the Active Site., Aurelius O, Johansson R, Bagenholm V, Lundin D, Tholander F, Balhuizen A, Beck T, Sahlin M, Sjoberg BM, Mulliez E, Logan DT, PLoS One. 2015 Jul 6;10(7):e0128199. doi: 10.1371/journal.pone.0128199., eCollection 2015. PMID: 26147435

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