( ...)Isolation of Genomic DNA from Saliva Using the Perfect gDNA Blood Mini ,,, Kit

It is not convenient in all instances to have blood drawn for gDNA extraction. The Eppendorf Perfect gDNA Blood Mini Kit was used to extract gDNA from saliva with only slight modifications to the protocol. The unique patent-pending trapping technology results in gDNA that is less sheared than the gDNA isolated using the common chaotropic bind-wash-and-elute technology. The gDNA also performs well in PCR as the main downstream application as well as in other downstream applications.

Materials

• Perfect gDNA Blood Mini Kit
  

• Ethanol 95100%; pipette tips; Microcentrifuge; Eppendorf Thermo-mixer, water bath, or heat block at 70C; 15 ml centrifuge tubes.
• 1x PBS (sufficient amounts are supplied in the kit for blood work, but additional amounts may be needed for saliva applications)

Isolation of gDNA:

1. Place 1 ml of saliva into a 15 ml centrifuge tube.
2. Add 4 ml of 1x PBS.
3. Centrifuge at 1,800 x g for 5 minutes
4. Decant the supernatant. Add 200 l 1x PBS and re-suspend pellet.
5. Add 20 l of Proteinase K solution into a 1.5 ml microcentrifuge tube. Transfer the re-suspension from step 4 into this same tube.
6. Add 350 l Solution G1 to the microcentrifuge tube and mix.
7. Incubate in Thermomixer at 70C, 900 rpm, for 10 minutes. A water bath may be used with in
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