Protein with a role in regulating Swe1p-dependent polarized growth%3B involved in maintaining Cdc55p in the cytoplasm where it promotes mitotic entry%3B involved in mitotic exit through Cdc14p regulation%3B interacts with silencing proteins at telomeres%3B has a role in Bcy1p localization%3B implicated in mRNA nuclear export%3B ZDS1 has a paralog%2C ZDS2%2C that arose from the whole genome duplication