1FML:
reference: A helical lid converts a sulfotransferase to a dehydratase., Pakhomova S, Kobayashi M, Buck J, Newcomer ME, Nat Struct Biol 2001 May;8(5):447-51. PMID: 11323722

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