Functional expression in Escherichia coli of low-affinity and high-affinity Na(+)(Li(+))/H(+) antiporters of Synechocystis

Synechocystis sp. strain PCC 6803 has five genes for putative Na(+)/H(+) antiporters (designated nhaS1, nhaS2, nhaS3, nhaS4, and nhaS5). The deduced amino acid sequences of NhaS1 and NhaS2 are similar to that of NhaP, the Na(+)/H(+) antiporter of Pseudomonas aeruginosa, whereas those of NhaS3, NhaS4...

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