1P16:
reference: Structure of an mRNA capping enzyme bound to the phosphorylated carboxy-terminal domain of RNA polymerase II., Fabrega C, Shen V, Shuman S, Lima CD, Mol Cell 2003 Jun;11(6):1549-61. PMID: 12820968

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