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.
A. A schematic diagram of the mechanism of tight Fur-dependent iron-limitation regulation switch developed for E. coli stains. The mechanism is described in Results and Discussion. B. Physical map of the pYPfhuA1 expression vector. Y, different replicate origins; MCS, multi-cloning sites; rrnBT1T2, ribosomal terminators T1 and T2.
