https://www.ncbi.nlm.nih.gov/Structure/pdb/4UUS
4UUS: CRYSTAL STRUCTURE OF A UBX-EXD-DNA COMPLEX INCLUDING THE UBDA MOTIF
5'-D(*AP*CP*GP*TP*GP*AP*TP*TP*TP*AP*TP*GP*GP*CP*G)-3'5'-D(*GP*TP*CP*GP*CP*CP*AP*TP*AP*AP*AP*TP*CP*AP*C)-3'HOMEOTIC PROTEIN EXTRADENTICLEHOMEOTIC PROTEIN...