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.
Examples of group 8 AA base pairs (trans-Hoogsteen/Hoogsteen) from 23S rRNA in the large ribosomal subunit, PDB 1VQ8. In addition to the Hoogsteen edge/sugar edge H-bonds, these pairs are stabilized by one (A) or two (B) H-bonds between the adenine amino proton and phosphate OP2 oxygen.
