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• PCR

  abbreviation of

  polymerase chain reaction

  Method used to amplify DNA sequences in vitro. PCR exploits the properties of the enzyme DNA polymerase to synthesize a complementary strand of DNA from a template strand. Scientists can specify which segments the polymerase enzyme is to copy. The method is particularly useful when only small amounts of DNA are available. Popular tool used in diagnostics, molecular biology, forensics, and archaeology.

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