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.
Illustration of local update. Two kinds of rewriting rules are applied to narrow the gap between predicted and target structures. Red bases {A U 3,11} and {A U 4,10} are updated to form base pairs, while blue bases {G C 2,13} are updated so that the pair is destroyed. Positions 5, 7 and 9 are essential positions and not updated. a Nucleotides need to be updated. b Updated RNA sequence
