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Journal of Bacteriology, March 2002, p. 1767-1771, Vol. 184, No. 6
0021-9193/02/$04.00+0     DOI: 10.1128/JB.184.6.1767-1771.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Analyses of the Roles of the Three cheA Homologs in Chemotaxis of Vibrio cholerae

Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee 38105,¹ Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan²

Received 31 October 2001/ Accepted 11 December 2001

The Vibrio cholerae genome revealed the presence of multiple sets of chemotaxis genes, including three cheA gene homologs. We found that the cheA-2, but not cheA-1 or cheA-3, gene is essential for chemotaxis under standard conditions. Loss of chemotaxis had no effect on virulence factor expression in vitro.

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