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 Shine-Dalgarno-anti-Shine-Dalgarno (SD-ASD) contact in translation initiation on the 30S ribosomal subunit; (A) messenger ribonucleic acid (mRNA, red) with an SD sequence binds the ASD (green) near the 3′-end of the 16S rRNA (PDB 1JGQ). The 16S rRNA is beige (body) and black (head/beak). mRNA lies across the neck. tRNAfMet (blue) binds in the P-site. Ribosomal proteins are white; (B) detail of the SD-ASD [red-green (carbons)] interaction (PDB 4V4Z).
