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 secondary and 3D structures for domain 5 of the Group II Intron from yeast ai5γ (ai5γ_NMR, PDB code 1R2P, left) and Pylaiella littoralis (PL_NMR, PDB code 2F88, right). The structural elements are indicated by color: tetraloop (pink), upper helix (blue), bulge (green), lower helix (red). Differences in sequence are boxed
