A yeast culture is a pure sample of a strain of yeast. Achieved by plating from dilute slurry onto agar. This yields a pure colony grown from a single cell, which can be used to grow up a new yeast starter as required. A culture an also be stored in a yeast bank for a number of years as insurance ...

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How long can I keep a slant/plate in a domestic fridge/freezer?

I am considering plating up some yeast/isolating cultures and starting my own small yeast bank, I know that If I were to keep these at -80C in a lab freezer they would keep for years, but how long ...