Although several companies sell tissue microarrays, not all of them are suited for every application. “One of the critical issues is the quality of the tissues used,” says Brown.

Two-color hybridization allows comparison of two samples labeled with different fluorescent dyes on the same microarray ... probes than cDNA from any single cell line. Ten different cell lines ...

One way they do this is to use a DNA microarray to determine the expression ... is isolated from the samples. The mRNA is color-coded with fluorescent tags and used to make a DNA copy (the mRNA ...