Posted: 30 Jul 2013 05:22 PM PDT
Polymerase chain reaction (PCR) is a technique used to amplify many copies of a desired DNA fragment, cycle by cycle. 30 years after the invention of PCR, a reverse process of PCR, removing PCR (R-PCR), has been developed which can eliminate undesired DNA fragments, cycle by cycle. If researchers want to amplify their desired genes, they can use PCR, whereas, if researchers want to remove their undesired genes, they can use this new technique, R-PCR.
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