2DLA:
reference: Molecular basis for the subunit assembly of the primase from an archaeon Pyrococcus horikoshii., Ito N, Matsui I, Matsui E, FEBS J. 2007 Mar;274(5):1340-51. Epub 2007 Feb 5. PMID: 17286576

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