1A49:
reference: Structure of the bis(Mg2+)-ATP-oxalate complex of the rabbit muscle pyruvate kinase at 2.1 A resolution: ATP binding over a barrel., Larsen TM, Benning MM, Rayment I, Reed GH, Biochemistry 1998 May 5;37(18):6247-55. PMID: 9572839

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