.... The basolateral membrane potential( V bl ) depolarized upon change of bath [K + ] from 3 to 20 mmol l -1 demonstrating a large K + conductance in this membrane. In collecting tubules and collecting ducts a V bl of -66±2 mV and -74±4 mV depolarized by 30±2 mV and 36±3 mV, respectively ( N =23; 15). The K + channel...

... to different membrane domains. * Address for reprint requests: Renal Unit, MGH-East, 149 13th Street, Charlestown, MA 02129, USA. © 1992 by Company of Biologists 1992 proton pumps collecting duct immunocytochemistry microtubules kidney A membrane-associated vacuolar H + -ATPase...