I have a quick question, I have A LOT of precipitations to do in the near future (more than 500), and adding glycogen to the precipitation mixture increases DNA and RNA yield (I have to do both, and samples contain very small amounts of nucleic acids, experiments have to do with determining detection limits). But, as adding glycogen to the reactions themselves would mean roughly 500 extra pipettings, I was wondering if it would harm my glycogen (or the precipitation procedure as a whole) if I would add it to my isopropanol in advance... It would save me a lot of time, but if it would make my precipitation perform less, I would not do it of course.