Inhibitor of growth 4 (ING4) is up-regulated by a low K intake and suppresses renal outer medullary K channels (ROMK) by MAPK stimulation.
Zhang X, Lin DH, Jin Y, Wang KS, Zhang Y, Babilonia E, Wang Z, Wang Z, Giebisch G, Han ZG, et al. Proc Natl Acad Sci U S A. 2007 May 29; 104(22):9517-22. Epub 2007 May 17.