Article Abstract:
Previous research has indicated the possibility that changes in the lipid environment can result in the activation of H+-ATPase in the plasma membrane of Saccharomyces cerevisiae. This hypothesis is investigated by studying the effect of decanoic acid on membrane fluidity and lipid composition in the plasma membrane H+-ATPase in cells grown either with or without decanoic acid. Results indicate a correlation between plasma membrane H+-ATPase activation and changes in membrane lipid constituents.
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Article Abstract:
The reaction of Saccharomyces cerevisiae to benzoic acid was analyzed to determine the energy-dependent mechanisms of resistance of yeasts to weak acid preservatives. Results show that the mechanism of extrusion required energy and prior growth in the presence of the inducers. When energy was available, S. cerevisiae released benzoic acid. On the other hand, inhibitor of ATPases such as diethylstilbestrol prevented benzoic acid intrusion.
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Article Abstract:
A study was conducted to show that the heat shock protein, HSP30, is activated by several stresses. Plasmid YIp30 was determined by ligation of the Ndel fragment of pUC19HSP30. Hsp12 mRNA levels were then measured to analyze conditions of nitrogen starvation and their impact on induction. Experimental results indicated that a third system for the activation of genes by heat shock exists in yeast.
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