3LGB:
reference: Shared active site architecture between the large subunit of eukaryotic primase and DNA photolyase., Sauguet L, Klinge S, Perera RL, Maman JD, Pellegrini L, PLoS One. 2010 Apr 9;5(4):e10083. PMID: 20404922

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