Wizard Genomic DNA Purification Kit Protocol - Department of ...

5. Incubate the sample at 37°C for 30–60 minutes to digest the cell wall. Cool
to room temperature.
6. Centrifuge the sample at 13,000–16,000 × g for 2 minutes and then remove
the supernatant.
7. Add 300µl of Nuclei Lysis Solution to the cell pellet and gently pipet to
mix.
8. Add 100µl of Protein Precipitation Solution and vortex vigorously at high
speed for 20 seconds.
9. Let the sample sit on ice for 5 minutes.
10. Centrifuge at 13,000–16,000 × g for 3 minutes.
11. Transfer the supernatant containing the DNA to a clean 1.5ml
microcentrifuge tube containing 300µl of room temperature isopropanol.
Note: Some supernatant may remain in the original tube containing the
protein pellet. Leave this residual liquid in the tube to avoid contaminating
the DNA solution with the precipitated protein.
12. Gently mix by inversion until the thread-like strands of DNA form a visible
mass.
13. Centrifuge at 13,000–16,000 × g for 2 minutes.
14. Carefully decant the supernatant and drain the tube on clean absorbent
paper. Add 300µl of room temperature 70% ethanol and gently invert the
tube several times to wash the DNA pellet.
15. Centrifuge at 13,000–16,000 × g for 2 minutes. Carefully aspirate all of the
ethanol.
16. Drain the tube on clean absorbent paper and allow the pellet to air-dry for
10–15 minutes.
17. Add 50µl of DNA Rehydration Solution.
18. Add 1.5µl of RNase Solution to the purified DNA sample. Vortex the
sample for 1 second. Centrifuge briefly in a microcentrifuge for 5 seconds
to collect the liquid and incubate at 37°C for 15 minutes.
19. Rehydrate the DNA by incubating at 65°C for 1 hour. Periodically mix the
solution by gently tapping the tube. Alternatively, rehydrate the DNA by
incubating the solution overnight at room temperature or at 4°C.
20. Store the DNA at 2–8°C.
Promega Corporation · 2800 Woods Hollow Road · Madison, WI 53711-5399 USA
Toll Free in USA 800-356-9526 · Phone 608-274-4330 · Fax 608-277-2516 · www.promega.com
Printed in USA.
Part# TM050
Revised 12/10 Page 15