Data Arangement:
 
                 Y
         ------------------
     (X)  A    C    G    U
         ------------------
             5' ==> 3'
                AX
                AY
             3' <== 5'
     (A)  .    .    .    .
     (C)  .    .    .    .
     (G)  .    .    .    .
     (U) -0.7 -0.1 -0.7 -0.1
 
--------------------------------
STACKING ENERGIES : TERMINAL MISMATCHES AND BASE-PAIRS.
 
        Y                   Y                   Y                   Y
------------------  ------------------  ------------------  ------------------
 A    C    G    U    A    C    G    U    A    C    G    U    A    C    G    U
------------------  ------------------  ------------------  ------------------
    5' --> 3'           5' --> 3'           5' --> 3'           5' --> 3'
       AX                  AX                  AX                  AX
       AY                  CY                  GY                  UY
    3' <-- 5'           3' <-- 5'           3' <-- 5'           3' <-- 5'
 .    .    .    .    .    .    .    .    .    .    .    .  -0.8 -1.0 -0.8 -1.0
 .    .    .    .    .    .    .    .    .    .    .    .  -0.6 -0.7 -0.6 -0.7
 .    .    .    .    .    .    .    .    .    .    .    .  -0.8 -1.0 -0.8 -1.0
 .    .    .    .    .    .    .    .    .    .    .    .  -0.6 -0.8 -0.6 -0.8
 
 
 
        Y                   Y                   Y                   Y
------------------  ------------------  ------------------  ------------------
 A    C    G    U    A    C    G    U    A    C    G    U    A    C    G    U
------------------  ------------------  ------------------  ------------------
    5' --> 3'           5' --> 3'           5' --> 3'           5' --> 3'
       CX                  CX                  CX                  CX
       AY                  CY                  GY                  UY
    3' <-- 5'           3' <-- 5'           3' <-- 5'           3' <-- 5'
 .    .    .    .    .    .    .    .    -1.5 -1.5 -1.4 -1.5  .    .    .    .    
 .    .    .    .    .    .    .    .    -1.0 -1.1 -1.0 -0.8  .    .    .    .    
 .    .    .    .    .    .    .    .    -1.4 -1.5 -1.6 -1.5  .    .    .    .    
 .    .    .    .    .    .    .    .    -1.0 -1.4 -1.0 -1.2  .    .    .    .    
 
 
 
        Y                   Y                   Y                   Y
------------------  ------------------  ------------------  ------------------
 A    C    G    U    A    C    G    U    A    C    G    U    A    C    G    U
------------------  ------------------  ------------------  ------------------
    5' --> 3'           5' --> 3'           5' --> 3'           5' --> 3'
       GX                  GX                  GX                  GX
       AY                  CY                  GY                  UY
    3' <-- 5'           3' <-- 5'           3' <-- 5'           3' <-- 5'
 .    .    .    .    -1.1 -1.5 -1.3 -1.5  .    .    .    .    -0.3 -1.0 -0.8 -1.0
 .    .    .    .    -1.1 -0.7 -1.1 -0.5  .    .    .    .    -0.6 -0.7 -0.6 -0.7
 .    .    .    .    -1.6 -1.5 -1.4 -1.5  .    .    .    .    -0.6 -1.0 -0.8 -1.0
 .    .    .    .    -1.1 -1.0 -1.1 -0.7  .    .    .    .    -0.6 -0.8 -0.6 -0.6
 
 
 
        Y                   Y                   Y                   Y
------------------  ------------------  ------------------  ------------------
 A    C    G    U    A    C    G    U    A    C    G    U    A    C    G    U
------------------  ------------------  ------------------  ------------------
    5' --> 3'           5' --> 3'           5' --> 3'           5' --> 3'
       UX                  UX                  UX                  UX
       AY                  CY                  GY                  UY
    3' <-- 5'           3' <-- 5'           3' <-- 5'           3' <-- 5'
-1.0 -0.8 -1.1 -0.8  .    .    .    .    -1.0 -0.8 -1.1 -0.8  .    .    .    .    
-0.7 -0.6 -0.7 -0.5  .    .    .    .    -0.7 -0.6 -0.7 -0.5  .    .    .    .    
-1.1 -0.8 -1.2 -0.8  .    .    .    .    -0.5 -0.8 -0.8 -0.8  .    .    .    .    
-0.7 -0.6 -0.7 -0.5  .    .    .    .    -0.7 -0.6 -0.7 -0.5  .    .    .    .