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Mapping 250K/500K SNP assay

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chapter 4 | 96-Well Plate Protocol 81<br />

3. Turn on the vacuum and slowly bring it up to 600 mbar.<br />

4. Check the vacuum by gently trying to lift the middle section of the<br />

manifold off the base.<br />

Be very careful not to lose any sample. You should not be able to<br />

lift the middle section off the base.<br />

5. Maintain the vacuum at 600 mbar until all of the wells are dry<br />

(approximately 1.5 to 2 hours).<br />

The vacuum regulator may sound like it is leaking. This sound is<br />

the pressure release working to limit the vacuum to 600 mbar.<br />

6. Wash the PCR products three times as follows, keeping the<br />

vacuum on the entire time:<br />

A. Add 75 mL AccuGENE® Water to a solution basin.<br />

B. Using a 12-channel P200 pipette, add 50 µL water to each well.<br />

C. Dry the wells for 15 to 20 minutes.<br />

The top and bottom rows may take longer to filter and dry.<br />

D. Repeat steps B and C two additional times for a total of 3 water<br />

washes.<br />

7. After the third wash, tap the manifold firmly on the bench to force<br />

any drops on the sides of the wells to move to the bottom and be<br />

pulled through the plate.<br />

8. Allow the samples to dry completely.<br />

Drying after the third wash may take 45 to 75 minutes.<br />

9. Tilt and inspect the plate to confirm that the top and bottom rows<br />

are completely dry.<br />

Do not allow the plate to sit on the manifold or the bench top for<br />

more than 90 minutes after the wells are completely dried.<br />

To prevent the dilution of DNA with water, ensure that every well<br />

is completely dry before adding RB Buffer.

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