The polymerase chain reaction (PCR), sometimes described as ‘molecular photocopying’, is a laboratory technique that allows researchers and technicians to amplify DNA or RNA from as little as a single strand. The technology was first created in 1983 by Biochemist Kary Mullis. Here we look at the development of this technique over the years, and how the technology behind the xxpress® thermal cycler has taken PCR into the future.

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