Classification of each dinucleotide step in a right-handed nucleic acid
     structure: A-like; B-like; TA-like; intermediate of A and B, or other cases

    step       Xp      Yp      Zp     XpH     YpH     ZpH    Form
   1 TC/GA   -2.83    8.72    0.03   -3.31    8.67    0.96
   2 CG/CG   -2.45    8.99    0.51   -2.39    8.93    1.07
   3 GC/GC   -2.65    9.13    0.47   -3.42    9.10    0.89     B
   4 CG/CG   -2.38    8.96    0.10   -3.20    8.74    1.89     B
   5 GT/AC    ---     ---     ---     ---     ---     ---     --- 
   6 TG/CA   -2.48    8.73    0.45   -0.54    8.46   -2.19
   7 GC/GC   -2.35    8.99   -0.01   -1.55    8.98   -0.39     B
   8 CG/CG   -2.35    8.90   -0.22   -0.95    8.90   -0.06     B
   9 GC/GC   -2.49    9.25    0.11   -2.74    9.25    0.34     B
  10 CT/AG   -2.29    9.14    0.24   -2.06    9.15    0.17     B