Purified cell-envelope polyphosphatase and polyphosphatase activities
of vacuole and cytosol preparations from the yeast Saccharomyces cerev
isiae were comparatively characterized. The data now available show th
at each of the studied organelles has its own unique polyphosphatase.
This organelle specificity of yeast polyphosphatases may reflect the e
ndosymbiotic origin of eucaryotic cells.