3DR4:
reference: Accommodation of GDP-linked sugars in the active site of GDP-perosamine synthase., Cook PD, Carney AE, Holden HM, Biochemistry. 2008 Oct 7;47(40):10685-93. Epub 2008 Sep 17. PMID: 18795799

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