Calculate the absolute value of the differences

Check this box to calculate the absolute value of the experimental - control intensity (or count) subtraction. This option is ideal for LOH loss of heterozygousity analysis. For example, this option is useful when there is an interest to determine whether the genotype count changed from heterozygous in the normal tissue sample to homozygous for either the dominant or the recessive allele in the tumor tissue sample.

To Calculate the Absolute Value of the Differences:

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Check the box.