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Science 2 April 1999:
Vol. 284. no. 5411, p. 82
DOI: 10.1126/science.284.5411.82
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COMPLEX SYSTEMS:
Unraveling Bacteria's Dependable Homing System

Elizabeth Pennisi

Microbiologists have never quite understood how bacteria can home in on a food source and navigate toward it reliably in spite of variations in the microbes' own genetic makeup or in their environments--until now. A pair of physicists-turned-molecular biologists has mathematically represented how this robust behavior arises from the complex interactions of proteins and pathways rather than from precisely controlling the concentrations and activities of proteins.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)