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Sci. STKE, 14 May 2002
Vol. 2002, Issue 132, p. pe24
[DOI: 10.1126/stke.2002.132.pe24]


Amplification of Signaling Events in Bacteria

Frederick W. Dahlquist*

Knight Professor and Head, Department of Chemistry, Member, Institute of Molecular Biology, University of Oregon, Eugene, OR 97403, USA.

Abstract: Bacteria respond to extremely shallow chemical gradients by modifying their motility in a process called chemotaxis. This chemotactic response is characterized by high sensitivity to small concentration differences, which extends over a large range of concentrations. This combination of high signal gain and large dynamic range results from both a memory of past events and the ability to amplify small differences in signal between the memory and the current environment. Dahlquist describes the signaling mechanism used by bacteria to regulate the flagellar motor and the places in this pathway where signal amplification may occur.

*Contact information. E-mail: fwd{at}

Citation: F. W. Dahlquist, Amplification of Signaling Events in Bacteria. Sci. STKE 2002, pe24 (2002).

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