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.
Sequence and structure of S-domains with nucleotide differences highlighted in red. (A) E. coli secondary structure arranged according to the crystal structure of T. thermophilus S-domain. (B) T. thermophilus secondary structure arranged according to the crystal structure (Krasilnikov et al. 2004). Nucleotide insertions relative to E. coli S-domain are circled. (C) Three-dimensional structure of T. thermophilus S-domain (1U96).
