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PCR (Polymerase chain reaction)

A DNA-enrichment method using a polymerase enzyme. Double-stranded DNA is split into two single strands. Short specific DNA sequences (primers) are bonded to each of these strands, which are then treated with a polymerase to produce two double-stranded DNA molecules (each up to several thousand base pairs long). This process is repeated for n number of cycles, and the target region is theoretically amplified 2n times.