4JC0:
reference: Two Fe-S clusters catalyze sulfur insertion by radical-SAM methylthiotransferases., Forouhar F, Arragain S, Atta M, Gambarelli S, Mouesca JM, Hussain M, Xiao R, Kieffer-Jaquinod S, Seetharaman J, Acton TB, Montelione GT, Mulliez E, Hunt JF, Fontecave M, Nat Chem Biol. 2013 Mar 31. doi: 10.1038/nchembio.1229. PMID: 23542644

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