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The K + channel of Saccharomyces cerevisiae encoded by the YKC1 gene includes two pore-loop sequences that are thought to form the hydrophilic lining of the pore. Gating of the channel is promoted by membrane depolarisation and is regulated by the extracellular K + concentration ([K + ] o ) both in the yeast and when expressed in Xenopus oocytes. Our previous work showed...
Saccharomyces cerevisiae Vig4/Vrg4 protein is a Golgi membrane protein which has multiple transmembrane domains and is essential for transport of GDP-mannose across the Golgi membrane. By immunoprecipitation of detergent-solubilized tagged protein, we found that this protein exists as oligomer. Two mutants vig4-1 and vig4-2 had amino acid substitutions in the C-terminal region, Ala286Val and Ser278Cys,...
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