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.
Schematic representation of thiocillin SAR. Substitution of residues backed by red panels result in loss of antibiotic production, while those backed in yellow sustain production but lose activity. Substitutions at positions illustrated in green allow production of active antibiotic analogues.
