4KVM:
reference: Molecular basis for N-terminal acetylation by the heterodimeric NatA complex., Liszczak G, Goldberg JM, Foyn H, Petersson EJ, Arnesen T, Marmorstein R, Nat Struct Mol Biol. 2013 Aug 4. doi: 10.1038/nsmb.2636. PMID: 23912279

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