Maheshri:EtOHppt: Difference between revisions
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= | <Font size="+1">Protocol for Nucleic Acid Precipitation from Diluted Solutions</font> | ||
#Add 1/10 volume of 3M sodium acetate (or 2M sodium chloride, or 5M ammonium acetate) to DNA solution. | |||
#Add Glycogen to a final 0.05-1µg/µl concentration. Use up to 1µl of Glycogen per 20µl of the solution. | |||
#Add 1 volume of isopropanol (or 2.5 volumes of ethanol) to the solution. Mix gently but thoroughly. Ethanol is recommended for precipitation of smaller than 200 b/bp RNA/DNA fragments. | |||
#Incubate the mixture at -20°C for up to 60min, or at -70°C for 30min. | |||
#Centrifuge the mixture for 10-15min at 10,000rpm. Discard the supernatant. | |||
#Rinse the pellet with cold 70% ethanol. Air-dry the pellet. | |||
#Dissolve DNA in Water, nuclease-free <http://www.fermentas.com/catalog/reagents/water.htm> (#R0581) or TE buffer. | |||
#Dissolve RNA in DEPC-treated Water <http://www.fermentas.com/catalog/reagents/depc.htm> (#R0601). | |||
''Using only sodium acetate and ethanol works well - CJZ 6/24/10'' | |||
Latest revision as of 12:35, 24 June 2010
Protocol for Nucleic Acid Precipitation from Diluted Solutions
- Add 1/10 volume of 3M sodium acetate (or 2M sodium chloride, or 5M ammonium acetate) to DNA solution.
- Add Glycogen to a final 0.05-1µg/µl concentration. Use up to 1µl of Glycogen per 20µl of the solution.
- Add 1 volume of isopropanol (or 2.5 volumes of ethanol) to the solution. Mix gently but thoroughly. Ethanol is recommended for precipitation of smaller than 200 b/bp RNA/DNA fragments.
- Incubate the mixture at -20°C for up to 60min, or at -70°C for 30min.
- Centrifuge the mixture for 10-15min at 10,000rpm. Discard the supernatant.
- Rinse the pellet with cold 70% ethanol. Air-dry the pellet.
- Dissolve DNA in Water, nuclease-free <http://www.fermentas.com/catalog/reagents/water.htm> (#R0581) or TE buffer.
- Dissolve RNA in DEPC-treated Water <http://www.fermentas.com/catalog/reagents/depc.htm> (#R0601).
Using only sodium acetate and ethanol works well - CJZ 6/24/10