3JQK:
reference: Structures of apo and GTP-bound molybdenum cofactor biosynthesis protein MoaC from Thermus thermophilus HB8., Kanaujia SP, Jeyakanthan J, Nakagawa N, Balasubramaniam S, Shinkai A, Kuramitsu S, Yokoyama S, Sekar K, Acta Crystallogr D Biol Crystallogr. 2010 Jul;66(Pt 7):821-33. Epub 2010 Jun 19. PMID: 20606263

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