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What is the relationship between the activity of Trk1,2 system and cell volume? Is cell volume affected by lack of the main potassium uptake systems? Comparison of cell volume in wild type and TRK mutants.
Is cell volume affected by potassium starvation?
The volume reduction as a response to the shift of cells from a medium of high potassium to potassium free medium will be studied in mutants lacking certain membrane transporters like Trk1,2 Nha1, etc. The conditions for the experiments follow Navarrete et al. (2010). Additionally knockouts of related regulation proteins (SAP155, SAP185) will be tested. For each mutant several time points will be measured to generate time courses.