Ternary and senary representations using DNA double-crossover tiles
  The information capacity of double-crossover (DX) tiles was successfully increased beyond a binary representation to higher base representations. By controlling the length and the position of DNA hairpins on the DX tile, ternary and senary (base-3 and base-6) digit representations were realized and verified by atomic force microscopy (AFM). Also, normal mode analysis (NMA) was carried out to study the mechanical characteristics of each structure. 
Byeonghoon Kim, Soojin Jo, Junyoung Son, Junghoon Kim, Si Un Hwang,   Sreekantha Reddy Dugasani, Min Hyeok Kim, Byung-Dong K...
physics.bio-ph cond-mat.soft