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The smallest molecule travels fastest once the current is switched on.

If the process is slab gel electrophoresis, the smallest molecule (or rather, about 200 million of them following PCR or some other process of amplification) will be the one nearest the positively-charged end of the gel.

If the analysis is by capillary electrophoresis, the smallest molecule will be the first one to pass the window and interrupt the laser beam.

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16y ago

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