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.
Expression of fusions of gfp to presumptive promoter regions of all4160 and of other genes in Anabaena sp. strain PCC 7120 and its Y7 (hepK::Tn5-1065), hepN::Tn5-1087b, and abp2 derivatives at 24 h after nitrogen stepdown. The arrowheads indicate heterocysts. (A) Bright-field images; (B) images of fluorescence of GFP.
