@article {1989, title = {{U}nusual helical packing in crystals of {D}{N}{A} bearing a mutation hot spot}, journal = {Nature}, volume = {341}, year = {1989}, month = {oct}, pages = {459{\textendash}462}, author = {Y Timsit and Westhof, E. and Fuchs, R.P. and Moras, D.} }