CRYSTAL STRUCTURES OF ESCHERICHIA COLI AND LACTOBACILLUS CASEI DIHYDROFOLATE REDUCTASE REFINED AT 1.7 ANGSTROMS RESOLUTION. I. GENERAL FEATURES AND BINDING OF METHOTREXATE
4dfr is a 2 chain structure with sequence from Escherichia coli B. This structure supersedes the now removed PDB entry 2dfr. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.