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.
C. difficile toxin A gene and locations of expression clones. The amino acid interval expressed in each clone is as follows: for Int. A-1, aa 30 to 100; for Int. A-2, aa 300 to 660; for Int. A-3, aa 660 to 1100; for Int. A-4, aa 1100 to 1610; for Int. A-5, aa 1450 to 1870; and for Int. A-6, aa 1870 to 2680. The shaded region at the 3′ end represents the repetitive domain of the toxin A gene.
