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 two cyclic octanucleotides of which the asymmetric unit is composed, showing (A) the relative orientations of base planes and (B) a perpendicular view illustrating the stacking of bases. The central sodium ion is included but water molecules and the numerous barium ions located in the analysis are omitted for clarity. Bases are colored: adenine, green; thymine, yellow; cytosine, blue; and the backbone, white (19, 20).
