Expression levels of RGS7 and RGS4 proteins determine the mode of regulation of the G protein-activated K(+) channel and control regulation of RGS7 by G beta 5. - Keren-Raifman T; Bera AK; Zveig D; Peleg S; Witherow DS; Slepak VZ; Dascal N (FEBS letters, 2001)