3I1A:
reference: Structure of the antibiotic resistance factor spectinomycin phosphotransferase from Legionella pneumophila., Fong DH, Lemke CT, Hwang J, Xiong B, Berghuis AM, J Biol Chem. 2010 Mar 26;285(13):9545-55. Epub 2010 Jan 19. PMID: 20089863

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