Tuesday, November 18, 2003

Description
Rapid Genomic Prep

Procedure
1. Grow 5 ml yeast cultures to saturation.

2. Collect cells by centrifugation and resuspend in 0.5 ml of water. Transfer cells to 1.5 ml microfuge tube and collect by a 5 second spin.

3. Pour off supernatant and briefly vortex to resuspend cells in residual liquid.

4. Add 0.2 ml of Buffer A (2% Triton X-100, 1% SDS, 100 mM NaCl, 10 mM Tris-HCl pH 8.0, 1 mM EDTA pH 8.0), 200 l glass beads, and 0.2 ml phenol:chloroform:isoamyl alcohol (25:24:1).

5. Vortex 3 minutes (setting #7 on a foam multi-tube vortex adaptor). Add 0.2 ml TE.

6. Spin 5 minutes. Transfer aqueous to new tube. OPTIONAL: Do a chloroform extraction.

7. Add 1 ml 100% EtOH (RT; cold EtOH will create a large, dirty pellet), invert tube to mix, and spin 2 minutes.

8. Discard supernatant, and resuspend pellet in 0.4 ml TE (no need to dry pellet).

9. Add 10 l 4M ammonium acetate, mix, and then add 1 ml 100% EtOH and mix.

10. Spin for 2 minutes and dry pellet. Resuspend in 50 l TE and use 10 l per digest

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