∆G°37 =
∆G°37(Watson-Crick Pairs) + ∆G°37 intermolecular initiation + ∆G°37(Internal Loop)
∆G°37 = ∆G°37(CG followed by AU) + ∆G°37(CG followed by GC) + ∆G°37 intermolecular initiation+ ∆G°37 initiation(5) + ΔG°37 asymmetry×| n1 - n2| + ΔG°37 mismatch(mismatch 1) + ΔG°37 mismatch(mismatch 2) + ΔG°37 AU/GU closure
∆G°37 =
–2.11 kcal/mol – 2.36 kcal/mol + 4.09 kcal/mol + 1.8 kcal/mol
+ 0.48×|2 - 3|
∆G°37 =
+1.5 kcal/mol