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Abstract

This invention provides a method of gene expression analysis that enables extensive gene expression analysis and simultaneous analysis of multiple samples of organisms for which genomic analysis has not yet been advanced. In this method, tags each comprising an oligonucleotide of more than 25 bp for identifying expressed genes, wherein the 3'-end of the tag is defined by a cleavage site of a type III restriction enzyme and the 5'-end thereof is defined by a cleavage site of another restriction enzyme located closest to the 3'-end of the cDNA of such genes, are immobilized on a solid support, gene-containing samples are hybridized to the solid support, and the signals emitted from the genes hybridized to the tags are detected to analyze the gene expression profiles in the samples.

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First Claim