ALEXANDER PUSHKIN,1 KAY-PONG YIP,3 IMRAN CLARK,2 NATALIA ABULADZE,1 TAE-HWAN KWON,6 SHUICHI TSURUOKA,4 GEORGE J. SCHWARTZ,5 SØREN NIELSEN,6 AND IRA KURTZ1 1Division of Nephrology and 2Department of Biological Chemistry, University of California at Los Angeles, School of Medicine, Los Angeles, California 90095; 3Department of Physiology and Biophysics, School of Medicine, University of South Flo...