DNA microarrays provide the means to analyze patterns of gene expression at different timepoints in a living cell.
These glass slides have thousands of short DNA strands attached to their surfaces. Like gene chips (right), they can be used to determine which genes are active in different cells. DNA microarrays are used by cancer researchers to study the biology of tumor cells.
Stanford University biologist Patrick Brown developed the microarray, a glass slide imprinted with DNA "ink" that is used to analyze an entire genome.
Igor Dawid and Thomas Sargent explain how they developed subtractive mRNA hybrization to find genes expressed by different cell types. Pat Brown and Steve Fodor show how genomes can be screened with DNA arrays and GeneChipsï¿½