2P4T:
reference: Structure of the Q67H mutant of R67 dihydrofolate reductase-NADP+ complex reveals a novel cofactor binding mode., Divya N, Grifith E, Narayana N, Protein Sci. 2007 Jun;16(6):1063-8. Epub 2007 May 1. PMID: 17473013

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