3DW8:
reference: Structure of a protein phosphatase 2A holoenzyme: insights into B55-mediated Tau dephosphorylation., Xu Y, Chen Y, Zhang P, Jeffrey PD, Shi Y, Mol Cell. 2008 Sep 26;31(6):873-85. PMID: 18922469

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