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.
Variable amino acid positions in CTX-M-14 β-lactamase. The structure of CTX-M-14 β-lactamase is shown in tan. Amino acid residues at positions 77, 167, and 240 are highlighted in blue. The catalytic serine (S70) is highlighted in red. The figure was generated using UCSF Chimera (46).
