Geneexpressionpatternsholdvaluableinformationregardingthespecificfunctionsofparticularcellandtissuetypes.Initially,theanalysisoftranscriptswaslimitedtotestingchangesinexpressionofonlyafewgenesatatimeusinglow-throughputmethodssuchasinsituhybridizationandRT-PCR.Inthepastdecade,withthe