Onward, microbes

9:24am, May 22, 2007

With a tweak to their genetic codes, bacteria have been coaxed to follow a chemical trail of a researcher's choosing.

Chemotactic bacteria, such as Escherichia coli, recognize and move toward certain chemicals. The chemicals bind to proteins on the microbe's surface, inducing an internal mechanism to drive the microbe's flagellum, a tail-like structure.

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