5X3D:
reference: Fosfomycin Biosynthesis via Transient Cytidylylation of 2-Hydroxyethylphosphonate by the Bifunctional Fom1 Enzyme., Cho SH, Kim SY, Tomita T, Shiraishi T, Park JS, Sato S, Kudo F, Eguchi T, Funa N, Nishiyama M, Kuzuyama T, ACS Chem Biol. 2017 Aug 18;12(8):2209-2215. doi: 10.1021/acschembio.7b00419. Epub, 2017 Jul 20. PMID: 28727444

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