1NSF:
reference: Structure of the ATP-dependent oligomerization domain of N-ethylmaleimide sensitive factor complexed with ATP., Yu RC, Hanson PI, Jahn R, Brunger AT, Nat Struct Biol 1998 Sep;5(9):803-11. PMID: 9731775

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