Especially when it comes to Illumina libraries, why is it commonly recommended to Speed-Vac without heat? Is this to prevent (or slow down) potential DNase activity?
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I believe this recommendation usually applies to RNA samples - which are more heat sensitive.
Depending on the buffer (some labs might use be pure H2O) and the lengths of fragments, using low temperatures (e.g. room temperature) might avoid denaturation of DNA samples.
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Thanks for the response, luc! I'm currently working through a ddRAD protocol (my second library). Long story short I have digested DNA w/ ligated adapters. I bead-cleaned them after pooling, but eluted with a large volume of HPLC H2O and Speed-Vacced to reduce the volume (from ~ 150 uL to ~ 30 uL).
Our normal vacuum pump is broken so I'm using a weaker replacement. It was taking forever so I upped the temp to ~ 45 C.
...and then, as often happens, I made myself paranoid. But I'm also genuinely curious about this recommendation. So thanks!
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