3CQD:
reference: Crystallographic Structure of Phosphofructokinase-2 from Escherichia coli in Complex with Two ATP Molecules. Implications for Substrate Inhibition., Cabrera R, Ambrosio AL, Garratt RC, Guixe V, Babul J, J Mol Biol. 2008 Aug 22. PMID: 18762190

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