Experimental approaches to evaluate cellular response to Potassium limitation. For this purpose, a series of isogenic strains derived from BY4741 and lacking one (TRK1 or TRK2) or both TRK genes encoding specific potassium uptake systems was constructed using the homologous recombination and Cre-lox system.
Cells are starved. Potassium and subsequently glucose are added to the medium. Proton and potassium fluxes across the plasma membrane are recorded before and after these events for WT and mutants lacking specific transporter proteins.