Polymerase Chain Reaction (PCR) Jump Station: The ultimate Web page for information on all aspects of the Polymerase Chain Reaction (PCR). The polymerase chain reaction is a technique for the amplification of DNA in the laboratory. PCR has revolutionised molecular biology over the last ten years. This Web site aims to provide scientists with a comprehensive directory for the polymerase chain reaction, DNA amplification and PCR related techniques and protocols.