Describe in brief the principle of DNA isolation through gel electrophoresis.
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DNA Electrophoresis. Gel electrophoresis separates DNA fragments by size in a solid support medium (an agarose gel). ... The rate of migration is proportional to size: smaller fragments move more quickly, and wind up at the bottom of the gel. DNA is visualized by including in the gel an intercalating dye, ethidium bromide.
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