5UL3:
reference: A B12-dependent radical SAM enzyme involved in oxetanocin A biosynthesis., Bridwell-Rabb J, Zhong A, Sun HG, Drennan CL, Liu HW, Nature. 2017 Mar 27. doi: 10.1038/nature21689. PMID: 28346939

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