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Polymerase Chain Reaction (PCR)

Polymerase Chain Reaction (PCR)

Polymerase chain reaction (PCR) is a fast and inexpensive technique used to "amplify" - copy - small segments of DNA. Because significant amounts of a sample of DNA are necessary for molecular and genetic analyses, studies of isolated pieces of DNA are nearly impossible without PCR amplification.


Credit: Darryl Leja, NHGRI.



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