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Validation of the GeneChip data by comparisons with Northern blotting. Left: A single Northern blot was successively hybridized with cDNA probes for the indicated genes. Right: The GeneChip expression data (normalized to the experiment mean) are displayed with the same order of samples. EtBr, ethidium bromide stain of the Northern gel showing 28S and 18S ribosomal RNAs.
