https://www.ncbi.nlm.nih.gov/Structure/pdb/3JXC
3JXC: Crystal structure of the P22 c2 repressor protein in complex with synthetic operator 9T in...
5'-D(*CP*AP*TP*TP*TP*AP*AP*GP*AP*TP*AP*TP*CP*TP*TP*AP*AP*AP*TP*G)-3'Repressor protein C2THALLIUM (I) ION