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.
Interoperator spacing influences O3-nirB enhancement of repression at O1-napF. The fold repression of lacZ gene expression by nitrate is plotted against the distance between the centers of operator elements O1-napF and O3-nirB. The dashed line indicates the ≤15-fold repression observed for the O3-lacZ O1-napF construct (see Table 2). Strains carry both narL+ and narP+ alleles.
