4PV2:
reference: Na(+)/K(+) exchange switches the catalytic apparatus of potassium-dependent plant L-asparaginase., Bejger M, Imiolczyk B, Clavel D, Gilski M, Pajak A, Marsolais F, Jaskolski M, Acta Crystallogr D Biol Crystallogr. 2014 Jul;70(Pt 7):1854-72. doi:, 10.1107/S1399004714008700. Epub 2014 Jun 29. PMID: 25004963

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