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Name: Sarah
Status: student
Grade: 9-12
Location: NY
Country: USA
Date: Spring 2012


Question:
When precipitating DNA from extracted cheek cells one pours a layer of ethyl alcohol on top of the cell lysis solution. Why must the ethyl alcohol be ice cold?



Replies:
The DNA is less soluble in cold ethanol than in warm ethanol, so you will yield more DNA with cold ethanol.

Hope this helps, Burr



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