>4bna_A: DNA (5'-D(*CP*GP*CP*GP*AP*AP*TP*TP*(CBR)P*GP*CP*G)-3') CGCGAATTCGCG >4bna_B: DNA (5'-D(*CP*GP*CP*GP*AP*AP*TP*TP*(CBR)P*GP*CP*G)-3') CGCGAATTCGCG