1LRR:
reference: Insights into negative modulation of E. coli replication initiation from the structure of SeqA-hemimethylated DNA complex., Guarne A, Zhao Q, Ghirlando R, Yang W, Nat Struct Biol 2002 Nov;9(11):839-43. PMID: 12379844

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