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J Bacteriol. 1975 September; 123(3): 824-827

Receptors for chemotaxis in Bacillus subtilis.

ABSTRACT

At least three receptors for chemotaxis toward L-amino acids in Bacillus subtilis could be found with the aid of taxis competition experiments. They are called the asparagine receptor, which detects asparagine and glutamine, the isoleucine receptor, which detects isoleucine, leucine, valine, phenylalanine, serine, threonine, cysteine, and methionine, and the alanine receptor, which detects alanine and proline. Histidine and glycine could not be assigned to one of these receptors. Cysteine and methionine were found to be general inhibitors of chemotaxis and serine was found to be a general stimulator of chemotaxis. Some structural analogues of amino acids were tested for chemotactic activity. The chemotactic activity of B. subtilis is compared with that of Escherichia coli.

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