4XYK:
reference: Structures of human phosphofructokinase-1 and atomic basis of cancer-associated mutations., Webb BA, Forouhar F, Szu FE, Seetharaman J, Tong L, Barber DL, Nature. 2015 May 18. doi: 10.1038/nature14405. PMID: 25985179

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