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Mapping 250K/500K SNP assay

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RUNNING GELS<br />

72 GeneChip ® <strong>Mapping</strong> <strong>500K</strong> Assay Manual<br />

Before Running Gels<br />

To ensure consistent results, take 3 µL aliquot from each PCR before<br />

adding EDTA.<br />

Wear the appropriate personal protective equipment when<br />

handling ethidium bromide.<br />

Run the Gels<br />

When the <strong>500K</strong> PCR program is finished:<br />

1. Remove each plate from the thermal cycler.<br />

2. Spin down plates at 2000 rpm for 30 sec.<br />

3. Place plates in cooling chambers on ice or keep at 4 °C.<br />

4. Label three fresh 96-well reaction plates P1Gel, P2Gel and P3Gel.<br />

5. Aliquot 3 µL of 2X Gel Loading Dye to each well of the three<br />

plates.<br />

6. Using a 12-channel P20 pipette, transfer 3 µL of each PCR product<br />

from plates P1, P2 and P3 to the corresponding plate, row and<br />

wells of plates P1Gel, P2Gel and P3Gel.<br />

Example: 3 µL of each PCR product from each well of row A on<br />

plate P1 is transferred to the corresponding wells of row A on plate<br />

P1Gel.<br />

7. Seal plates P1Gel, P2Gel and P3Gel.<br />

8. Vortex the center of plates P1Gel, P2Gel and P3Gel, then spin<br />

down at 2000 rpm for 30 sec.<br />

9. Load all 6 µL from each well of plates P1Gel, P2Gel and P3Gel onto<br />

2% TBE gels.<br />

10. Run the gels at 120V for 40 minutes to 1 hour.<br />

11. Verify that the PCR product distribution is between ~250 bp to<br />

1100 bp (see Figure 4.3).<br />

90 µg of PCR product is needed for fragmentation.

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