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.
The Lac operator sequences used for the present studies. For the wild-type operator the asymmetric regions between the two sites relative to the central base pair are indicated in bold. For the two symmetric operators the spacing of the two half-sites relative to wild-type operator is indicated in parentheses.
