2NAC:
reference: High resolution structures of holo and apo formate dehydrogenase., Lamzin VS, Dauter Z, Popov VO, Harutyunyan EH, Wilson KS, J Mol Biol 1994 Feb 25;236(3):759-85. PMID: 8114093

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