3LWM:
reference: Replication through an abasic DNA lesion: structural basis for adenine selectivity., Obeid S, Blatter N, Kranaster R, Schnur A, Diederichs K, Welte W, Marx A, EMBO J. 2010 Apr 16. PMID: 20400942

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