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. 1985 Nov;164(2):802–810. doi: 10.1128/jb.164.2.802-810.1985

Complementation and characterization of chemotaxis mutants of Bacillus subtilis.

G W Ordal, H M Parker, J R Kirby
PMCID: PMC214322  PMID: 3932330

Abstract

A set of chemotaxis mutants of Bacillus subtilis was complemented by using SP beta c2 transducing bacteriophage either containing cloned segments of DNA or derived from abnormal excision of SP beta c2 dl2::Tn917 inserted into the chemotaxis region. Representative mutants were characterized in capillary assays for chemotaxis toward four amino acids and mannitol and in tethered-cell experiments for addition and removal of two attractants and two repellents. Twenty complementation groups were identified, in addition to the cheR previously characterized. All were found to be defective in chemotaxis toward all chemoeffectors. They were assigned the names cheA through cheU. The large number of general chemotaxis genes in B. subtilis, in contrast to the six in Escherichia coli, suggests fundamental differences in the mechanism of chemotaxis in the two species.

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Selected References

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