4FH1: S. Cerevisiae Ubc13-N79a
reference: A conserved asparagine has a structural role in ubiquitin-conjugating enzymes., Berndsen CE, Wiener R, Yu IW, Ringel AE, Wolberger C, Nat Chem Biol. 2013 Mar;9(3):154-6. doi: 10.1038/nchembio.1159. Epub 2013 Jan 6. PMID: 23292652

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