Example of microarray data.
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Example of microarray data.
Microarray analysis can be performed to assess differences in gene expression between two different samples. After isolating nucleic acids from the two samples, one sample is labeled with a dye that fluoresces green, and the other sample is labeled with a dye that fluoresces red. The samples are combined in equal amounts and hybridized to the array. Each spot on a microarray contains a specific gene sequence. When the array is scanned, green or red spots indicate expression of the gene in only one sample, and yellow spots indicate expression of the gene in both samples.
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