Parameter:

ΔG°37 loop
(kcal/mol)

Initiation, n=1 +3.8 ± 1.1
Initiation, n=2 +2.8 ± 1.3
Initiation, n=3 +3.2 ± 1.9
Initiation, n=4 +3.6
Initiation, n=5 +4.0
Initiation, n=6 +4.4