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.
Comparison of the GAAA duplex (a) and a canonical RNA-A dodecamer double helix (b) viewed from three orthogonal directions. The mini-helices are viewed perpendicular to and down the helix axes in exactly the same orientation. A ribbon passing through the phosphates emphasizes backbone distortion.
