Complementation of Nonchemotactic Mutants of Escherichia Coli

HE capacity to respond to stimuli by movement is a common property of Tl. iving things. A simple form of response is a taxis, in which the organisms avoid, or accumulate near, the source of stimulation. Chemotaxis, the response to a chemical, has been observed in a wide variety of microorganisms, plants and animals (JENNINGS 1906;