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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Characterization and sequencing of an uncoupled lactose carrier mutant of Escherichia coli.

A lactose carrier mutant of Escherichia coli (ML308-22) showed a severe defect in thiomethylgalactoside accumulation but a faster than normal entry of o-nitrophenyl-galactoside. Sequencing of the mutant lacY gene revealed a point mutation resulting in the substitution of glycine-159 by a cysteine residue. The mutant showed an increased sensitivity to sulfhydryl reagents, a property that is consistent with the view that the Cysteine-159 is in or near the sugar recognition site and the energy coupling region of the carrier.[1]

References

  1. Characterization and sequencing of an uncoupled lactose carrier mutant of Escherichia coli. Matos, M.E., Wilson, T.H. Biochem. Biophys. Res. Commun. (1994) [Pubmed]
 
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