5VSJ:
reference: Zwitterionic pyrrolidene-phosphonates: inhibitors of the glycoside hydrolase-like phosphorylase Streptomyces coelicolor GlgEI-V279S., Veleti SK, Petit C, Ronning DR, Sucheck SJ, Org Biomol Chem. 2017 May 10;15(18):3884-3891. doi: 10.1039/c7ob00388a. PMID: 28422240

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