1QKK:
reference: A dimeric two-component receiver domain inhibits the sigma54-dependent ATPase in DctD., Meyer MG, Park S, Zeringue L, Staley M, McKinstry M, Kaufman RI, Zhang H, Yan D, Yennawar N, Yennawar H, Farber GK, Nixon BT, FASEB J 2001 May;15(7):1326-8. PMID: 11344129

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