Here is some data: vacuolar protease B NATURAL_HOST Saccharomyces cerevisiae; vacuolar protease B PRION_PHENOTYPE failure to degrade cellular proteins under N starvation; vacuolar protease B FUNCTION death in stationary phase, failure in meiosis.

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With the phenotype of faling to degrade cellular proteins under N starvation, vacuolar protease B has natural host Saccharomyces cerevisiae, whose normal function is death in stationary phase and failure in meiosis.