3MHY:
reference: A new PII protein structure identifies the 2-oxoglutarate binding site., Truan D, Huergo LF, Chubatsu LS, Merrick M, Li XD, Winkler FK, J Mol Biol. 2010 May 19. PMID: 20493877

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