3HHP:
reference: Structure of Escherichia coli malate dehydrogenase at 1.45 A resolution., Zaitseva J, Meneely KM, Lamb AL, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2009 Sep 1;65(Pt, 9):866-9. Epub 2009 Aug 20. PMID: 19724119

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