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.
Naturally occurring extended-spectrum and inhibitor-resistant β-lactamases*
| β-Lactamase | Substitutions |
|---|---|
| TEM-1 | Wild type |
| TEM-20 | M182T, G238S |
| TEM-32 | M182T, M69I |
| TEM-43 | M182T, E104K, R164H |
| TEM-52 | M182T, E104K, G238S |
| TEM-63/TEM-64 | M182T, L21F, E104K, R164S |
| TEM-72 | M182T, G238S, E240K |
Taken from the table of TEM-1 variants at http://www.lahey.hitchcock.org/pages/lhc/studies/webt.htm.
