Team:EPF-Lausanne/Protocol/DNAConcentration

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* Take a new 6 µl aliquote of the DNA (under the hood) and put back the main DNA tube in the fridge.
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* Take a 6 µl aliquote of the DNA and put back the main DNA tube in the fridge.
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* Go to the room by the E. coli lab (not on Friday morning!) with:
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* Go to the room by the E.Coli lab (LBTM, not on Friday morning!) with:
** The 6 µl aliquote
** The 6 µl aliquote
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** A 10 µl pipete
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** A 10 µl pipet
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** Eventually some 5 µl of TE buffer (they migh have some).
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** Optionally, the buffer you used for DNA elution (there might be some next to the machine).
* The machine is the NanoDrop Spectrophotometer.
* The machine is the NanoDrop Spectrophotometer.
* On the computer, click on "Nucleic Acid".
* On the computer, click on "Nucleic Acid".
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* Add 2 µl of (nuclease free) water to the machine's tip as you are asked to and measure.
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* Put a 2 µl drop of (nuclease-free) water on the machine's tip as you are asked to and measure.
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* Clean tips (both sides) with a tissue.
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* Clean tips (both sides) with a quarter of tissue.
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* Add 2 µl of TE buffer and click on "Blank".
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* Add 2 µl of the buffer you use and click on "Blank".
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* Clean tips (both sides) with a tissue.
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* Clean tips (both sides).
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* Add 2 µl of DNA and click "Measure".
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* Add 2 µl of your DNA sample and click "Measure".
* Clean tips (both sides) with a tissue.
* Clean tips (both sides) with a tissue.
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* Take 2 measurements per sample and average.  
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* Take 2 measurements per sample (for averaging).
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* Print the report when you are done
* Click on exit.
* Click on exit.

Latest revision as of 00:31, 18 September 2012

Protocol: DNA Concentration Measurement


  • Take a 6 µl aliquote of the DNA and put back the main DNA tube in the fridge.
  • Go to the room by the E.Coli lab (LBTM, not on Friday morning!) with:
    • The 6 µl aliquote
    • A 10 µl pipet
    • Optionally, the buffer you used for DNA elution (there might be some next to the machine).
  • The machine is the NanoDrop Spectrophotometer.
  • On the computer, click on "Nucleic Acid".
  • Put a 2 µl drop of (nuclease-free) water on the machine's tip as you are asked to and measure.
  • Clean tips (both sides) with a quarter of tissue.
  • Add 2 µl of the buffer you use and click on "Blank".
  • Clean tips (both sides).
  • Add 2 µl of your DNA sample and click "Measure".
  • Clean tips (both sides) with a tissue.
  • Take 2 measurements per sample (for averaging).
  • Print the report when you are done
  • Click on exit.

The important numbers are:

  • 260/280 ratio, must be > 1.8
  • 260/230 ratio, must be > 2 (too big, > 2.5? , might mean too much salts)
  • Of course the DNA concentration.