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 change in a conserved amino acid of Ehrlichia chaffeensis σ70 4.2 region further reduced the promoter activity in -35 motif mutants. The activities for the -35 motif mutants T1A, T2A and C4T of p28-Omp19 promoter were assessed with E. chaffeensis σ70 mutant (E597A) by measuring changes in the β-galactosidase expression in the E. coli strain CAG20177. The reduction of the enzyme activity was expressed relative to the wild-type promoter.
