4ZTY:
reference: Fungal cobalamin-independent methionine synthase: Insights from the model organism, Neurospora crassa., Wheatley RW, Ng KK, Kapoor M, Arch Biochem Biophys. 2015 Nov 30;590:125-137. doi: 10.1016/j.abb.2015.11.037. PMID: 26657067

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