3EC1:
reference: The structure of YqeH. An AtNOS1/AtNOA1 ortholog that couples GTP hydrolysis to molecular recognition., Sudhamsu J, Lee GI, Klessig DF, Crane BR, J Biol Chem. 2008 Nov 21;283(47):32968-76. Epub 2008 Sep 18. PMID: 18801747

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