6DCH:
reference: Isonitrile Formation by a Non-heme Iron(II)-Dependent Oxidase/Decarboxylase., Harris N, Born D, Cai W, Huang Y, Martin J, Khalaf R, Drennan C, Zhang W, Angew Chem Int Ed Engl. 2018 Jun 15. doi: 10.1002/anie.201804307. PMID: 29906336

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