4OJT:
reference: Crystal structures of the Helicobacter pylori MTAN enzyme reveal specific interactions between S-adenosylhomocysteine and the 5'-alkylthio binding subsite., Mishra V, Ronning DR, Biochemistry. 2012 Dec 4;51(48):9763-72. doi: 10.1021/bi301221k. Epub 2012 Nov, 20. PMID: 23148563

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