6SUT:
reference: Resistance to the "last resort" antibiotic colistin: a single-zinc mechanism for phosphointermediate formation in MCR enzymes., Lythell E, Suardiaz R, Hinchliffe P, Hanpaibool C, Visitsatthawong S, Oliveira ASF, Lang EJM, Surawatanawong P, Lee VS, Rungrotmongkol T, Fey N, Spencer J, Mulholland AJ, Chem Commun (Camb). 2020 Jun 23;56(50):6874-6877. doi: 10.1039/d0cc02520h. PMID: 32432618

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