4FXP:
reference: Nucleotide binding site communication in Arabidopsis thaliana adenosine 5'-phosphosulfate kinase., Ravilious GE, Jez JM, J Biol Chem. 2012 Aug 31;287(36):30385-94. doi: 10.1074/jbc.M112.387001. Epub, 2012 Jul 18. PMID: 22810229

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