Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The calculated entropies of hairpin, bulge and internal loops and the corresponding experimental values. The model used in calculation is the 6-state model. All the three figures are plotted with the same scale, which is also the same with that used in Ref. 16 to facilitate comparison with the previous theoretical model.
