1DHJ:
reference: Long-range structural effects in a second-site revertant of a mutant dihydrofolate reductase., Brown KA, Howell EE, Kraut J, Proc Natl Acad Sci U S A 1993 Dec 15;90(24):11753-6. PMID: 8265622

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