3M4U:
reference: The Trypanosoma brucei life cycle switch TbPTP1 is structurally conserved and dephosphorylates the nucleolar protein NOPP44/46., Chou S, Jensen BC, Parsons M, Alber T, Grundner C, J Biol Chem. 2010 Jul 16;285(29):22075-81. Epub 2010 May 5. PMID: 20444707

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