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So stay away from change channel spots.
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For these analyses, spot values from the raw data were flagged if any of the following were observed: > 30% of the pixels were saturated in either channel, spot diameter < 70 um in either channel, or spot was not found by the scanning software.
And probably less of a focus on Matthew Broderick than the off-channel spots and what went into the trailer.
Spots in which > 50% of the pixels reached saturation in either channel, flagged spots and spots with intensity ≤ 200 in one channel and ≤ 500 in the other channel were filtered out.
We used a cross-species meta-analysis approach for the integration, at the gene level, of sixteen transcriptional datasets from different organisms (human, mouse, rat and yeast) and experimental platforms (Affymetrix, single and double channels spotted oligonucleotides).
In principle, common reference experiments with dye swap arrays can be corrected for bias in one-channel depleted spots, as long as the reference channel is properly identified on each array.
For one-channel depleted spots, the fact that the opposite channel was measurable provides information which is neglected when we set the weight to 0. For example, sample depleted (sd) spots are those for which the sample channel is missing, while a measurable reference channel indicates a good quality spot, which suggests a low expression.
We then defined one-channel depleted spots to be the spots where the intensity in one of the channels was missing or non-positive after background subtraction.
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