6D0M:
reference: Structural basis for polymerase eta-promoted resistance to the anticancer nucleoside analog cytarabine., Rechkoblit O, Choudhury JR, Buku A, Prakash L, Prakash S, Aggarwal AK, Sci Rep. 2018 Aug 23;8(1):12702. doi: 10.1038/s41598-018-30796-w. PMID: 30140014

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