RT Journal A1 Eickhoff, Holger A1 Schuchhardt, Johannes A1 Ivanov, Igor A1 Meier-Ewert, Sebastian A1 O'Brien, John A1 Malik, Arif A1 Tandon, Neeraj A1 Wolski, Eryk-Witold A1 Rohlfs, Elke A1 Nyarsik, Lajos A1 Reinhardt, Richard A1 Nietfeld, Wilfried A1 Lehrach, Hans T1 Tissue Gene Expression Analysis Using Arrayed Normalized cDNA Libraries JF Genome Research JO Genome Research YR 2000 FD August 01 VO 10 IS 8 SP 1230 OP 1240 DO 10.1101/gr.10.8.1230 UL http://genome.cshlp.org/content/10/8/1230.abstract AB We have used oligonucleotide-fingerprinting data on 60,000 cDNA clones from two different mouse embryonic stages to establish a normalized cDNA clone set. The normalized set of 5,376 clones represents different clusters and therefore, in almost all cases, different genes. The inserts of the cDNA clones were amplified by PCR and spotted on glass slides. The resulting arrays were hybridized with mRNA probes prepared from six different adult mouse tissues. Expression profiles were analyzed by hierarchical clustering techniques. We have chosen radioactive detection because it combines robustness with sensitivity and allows the comparison of multiple normalized experiments. Sensitive detection combined with highly effective clustering algorithms allowed the identification of tissue-specific expression profiles and the detection of genes specifically expressed in the tissues investigated. The obtained results are publicly available (http://www.rzpd.de) and can be used by other researchers as a digital expression reference.[The sequence data described in this paper have been submitted to the EMBL data library under accession nos. AL360374–AL36537.]