[Possible existence of alternative secretion routes of acid phosphatase in the yeast Saccharomyces cerevisiae].

The secretion of different acid phosphatase forms into the growth medium was studied in the yeast Saccharomyces cerevisiae. The secretion of constitutive acid phosphatase highly correlated with the process of bud formation. This exoenzyme might be involved in the construction of the bud cell wall. Analysis of the rate, at which repressible acid phosphatase was excreted into the growth medium, as well as a negative correlation between its secretion and the process of bud formation were indicative of an additional route via which the repressible form of acid phosphatase was secreted. It is possible that yeast cells contain vesicles similar to "safe" vesicles in higher eukaryotic cells.