2C5S:
reference: Crystal structure of Bacillus anthracis ThiI, a tRNA-modifying enzyme containing the predicted RNA-binding THUMP domain., Waterman DG, Ortiz-Lombardia M, Fogg MJ, Koonin EV, Antson AA, J Mol Biol. 2006 Feb 10;356(1):97-110. Epub 2005 Nov 22. PMID: 16343540

This OCA Structure page
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