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Molecular Approach to Identify Source of Fecal Contamination EPA ...

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Agarose Gel Electrophoresis<br />

• An electrical voltage<br />

is applied <strong>to</strong> the PCR<br />

product <strong>to</strong> cause the<br />

DNA fragments <strong>to</strong><br />

migrate.<br />

• The distance that the<br />

DNA fragments<br />

migrate is related <strong>to</strong><br />

their molecular<br />

weights and number<br />

<strong>of</strong> base pairs.

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