In a genome-wide expression study using a DNA microarray assay, what is each well used to detect?

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Each well on a DNA microarray is used to detect the expression of a specific gene by a cell. The microarray contains small DNA sequences, called probes, that are complementary to specific genes. When a cell's mRNA is hybridized to the microarray, any complementary sequences will bind, allowing researchers to determine which genes are being expressed in the cell.

In a Genome-Wide Expression Study Using a DNA Microarray Assay