5IUD:
reference: Human DNA polymerase alpha in binary complex with a DNA:DNA template-primer., Coloma J, Johnson RE, Prakash L, Prakash S, Aggarwal AK, Sci Rep. 2016 Apr 1;6:23784. doi: 10.1038/srep23784. PMID: 27032819

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