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.
Alignment of the dimerization region of the b subunits of Escherichia coli and other bacterial species using the Clustal W alignment program (Thompson et al. 1994). The arrangement of the heptad repeat identified in the E. coli b subunit according to the COILS program (Lupas 1996) is shown. The last line shows a consensus sequence for this alignment where an upper-case letter indicates that amino acid is present in at least 70% of the 10 sequences (X = I, L, V).
