Defining membrane spanning domains and crucial membrane-localized acidic amino acid residues for K⁺ transport of a Kup/HAK/KT-type Escherichia coli potassium transporter.

Defining membrane spanning domains and crucial membrane-localized acidic amino acid residues for K⁺ transport of a Kup/HAK/KT-type Escherichia coli potassium transporter.