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Mapping 250K/500K SNP assay

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HANDLING THE GENECHIP ® PROBE ARRAY<br />

chapter 5 | Washing, Staining, and Scanning Arrays 149<br />

Before scanning the probe array, follow directions in this section on<br />

handling the probe array. If necessary, clean the glass surface of the<br />

probe array with a non-abrasive towel or tissue before scanning. Do not<br />

use alcohol to clean the glass.<br />

Before scanning the probe array cartridge, Tough-Spots ® , label spots<br />

can be applied to each of the two septa on the probe array cartridge to<br />

prevent leaking of fluids from the cartridge during scanning.<br />

Apply the spots just before scanning. Do not use them in the<br />

washing and staining process.<br />

1. On the back of the probe array cartridge, clean excess fluid from<br />

around the septa.<br />

2. Carefully apply one spot to each of the two septa. Press to ensure<br />

the spots remain flat. If the spots do not apply smoothly (that is, if<br />

bumps, bubbles, tears or curled edges are observed) do not attempt<br />

to smooth out the spot. Remove the spot and apply a new spot. See<br />

Figure 5.2.<br />

Figure 5.2<br />

Applying Tough-Spots ® to the probe array cartridge

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