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<p><strong>Southern Blots vs Northern Blots</strong></p>
<p><strong>[[image:southern.gif]] [[image:northern.jpg]]<br />
<br /><br />DNA array = Massively parallel version of Southern & Northern blotting <br /></strong> Difference <br /> - Southern, Northern Blot<br /> ; Distribute the oligonucleotide probes over a gel <br /> Radioactively labeled oligonucleotide <br /> "one gene, one messenger "<br /> - DNA array<br /> ; Oligonucleotide probes are immobilized on a surface at micrometer distance <br /> Sample is usually labeled with a fluorescent dye <br /> " many genes, many messenger "<br /><br /><br /></p>
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