4XQ0:
reference: Genetic and structural analysis of the essential fission yeast RNA polymerase II CTD phosphatase Fcp1., Schwer B, Ghosh A, Sanchez AM, Lima CD, Shuman S, RNA. 2015 Apr 16. PMID: 25883047

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