- Maxi-K channels contribute to urinary potassium excretion in the ROMK-deficient mouse model of Type II Bartter's syndrome and in adaptation to a high-K diet. Bailey, M.A., Cantone, A., Yan, Q., MacGregor, G.G., Leng, Q., Amorim, J.B., Wang, T., Hebert, S.C., Giebisch, G., Malnic, G. Kidney Int. (2006)