3NE9:
reference: Mycobacterium tuberculosis acyl carrier protein synthase adopts two different pH-dependent structural conformations., Gokulan K, Aggarwal A, Shipman L, Besra GS, Sacchettini JC, Acta Crystallogr D Biol Crystallogr. 2011 Jul;67(Pt 7):657-69. doi:, 10.1107/S0907444911020221. Epub 2011 Jun 11. PMID: 21697604

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