1E2T:
reference: Structure of arylamine N-acetyltransferase reveals a catalytic triad., Sinclair JC, Sandy J, Delgoda R, Sim E, Noble ME, Nat Struct Biol 2000 Jul;7(7):560-4. PMID: 10876241

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