| 3APY: reference: Properties and Crystal Structure of Methylenetetrahydrofolate Reductase from Thermus thermophilus HB8., Igari S, Ohtaki A, Yamanaka Y, Sato Y, Yohda M, Odaka M, Noguchi K, Yamada K, PLoS One. 2011;6(8):e23716. Epub 2011 Aug 15. PMID: 21858212 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).