Abstract
Previous work has shown that high molecular weight compounds were released from Saccharomyces bisporus by β-mercaptoethanol, 2 M KCl, 0.5 M KCl and osmotic shock without affecting viability of the cells. In this current experiment, it was shown that low molecular weight compounds were also eluted when cells were treated in sequence with the same reagents. Alanine, glutamate, serine, an unidentified amino acid, glucose, glycerol, and arabitol were all eluted by each of the first three reagents. The osmotic shock eluate contained a larger number and quantity of amino acids than the first three eluates but, otherwise, the compounds in this eluate were the same. One hundred percent of the cellular glycerol and 65–70% of the total amounts of the other above mentioned solutes were released by the 4 eluting treatments. A hot water treatment was needed to extract the remainder of these solutes. The hot water extract also contained almost all the cellular proline. It was suggested that the elutable solutes are contained by cells in compartments (or vesicles) whose membranes are accessible to the eluting reagents without affecting the plasmalemma.
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Weimberg, R. Elution of low molecular weight solutes from viable cells of Saccharomyces bisporus . Arch. Microbiol. 134, 329–334 (1983). https://doi.org/10.1007/BF00407812
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DOI: https://doi.org/10.1007/BF00407812