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The α and β subunits of the amiloride-sensitive rat epithelial sodium channel (αβENaC) were expressed in the yeast Saccharomyces cerevisiae. We used a combination of yeast strains, including a mutant in the secretory pathway (sec6), and Western blotting techniques, to show that αβENaC was synthesized and targeted through the secretory system to the plasma membrane. Yeasts expressing αβENaC were more...
Competition experiments revealed that adenine and guanine were transported by a purine permease in both Candida glabrata 4 and a C. glabrata 4 cytosine permease negative mutant. The C. glabrata 4 cytosine permease negative mutant was isolated using 5-fluorocytosine selection. This mutant no longer transported cytosine, but transported adenine and guanine. A transport system for hypoxanthine was...
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