1SEJ:
reference: Two crystal structures of dihydrofolate reductase-thymidylate synthase from Cryptosporidium hominis reveal protein-ligand interactions including a structural basis for observed antifolate resistance., Anderson AC, Acta Crystallograph Sect F Struct Biol Cryst Commun. 2005 Mar 1;61(Pt, 3):258-62. Epub 2005 Feb 8. PMID: 16511011

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