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.
PCR products of AcrA (A), AcrB (B), and TolC (C) genes in 1% agarose gel.
L indicates the DNA ladder; PCR, polymerase chain reaction. Escherichia coli isolate numbers are indicated above the image of the gel with PCR products shown by an arrow.
