1AKH:
reference: Crystal structure of the MATa1/MATalpha2 homeodomain heterodimer in complex with DNA containing an A-tract., Li T, Jin Y, Vershon AK, Wolberger C, Nucleic Acids Res 1998 Dec 15;26(24):5707-18. PMID: 9838003

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