| 5I3C: reference: Crystal structure of Escherichia coli purine nucleoside phosphorylase complexed with acyclovir., Timofeev VI, Zhukhlistova NE, Abramchik YA, Muravieva TI, Esipov RS, Kuranova IP, Acta Crystallogr F Struct Biol Commun. 2018 Jul 1;74(Pt 7):402-409. doi:, 10.1107/S2053230X18008087. Epub 2018 Jun 26. PMID: 29969103 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).