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.
Stereographic pairwise superpositions of the respective DAP, AP, A8 and U8 ball-and-stick models with the native G8 hairpin ribozyme (black). (A) DAP8 and the native G8 structure. (B) AP8 and the native G8 structure. (C) A8 and the native G8 structure. (D) U8 and the native G8 structure.
