Cleaning up a yeast bank

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StAnthonyB

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Is it possible to clean up a yeast sample with low levels of infection by plating it onto a sterile agar/gelatin sample, and visually selecting the best looking colonies for propogation?


I got to thinking about a way to maintain a samples purity threshold since I figure it is inevitable that a yeast bank will eventually develop some level of infection over time.
 
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