2FRX:
reference: The structure of the RNA m5C methyltransferase YebU from Escherichia coli reveals a C-terminal RNA-recruiting PUA domain., Hallberg BM, Ericsson UB, Johnson KA, Andersen NM, Douthwaite S, Nordlund P, Beuscher AE 4th, Erlandsen H, J Mol Biol. 2006 Jul 21;360(4):774-87. Epub 2006 Jun 6. PMID: 16793063

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).