Remembering biochemist Kary Mullis, who discovered polymerase chain reaction (PCR).
Mullis was tired. He was out driving a distance he had driven so many times that he could drive it in his sleep. It was dark and his thoughts wandered. After a while, all the pieces of the puzzle fell into place. He finally had to stop his car to think properly.
Mullis was awarded the chemistry prize for his invention of the process known as polymerase chain reaction (PCR), in which a small amount of DNA can be copied in large quantities over a short period of time. By applying heat, the DNA molecule's two strands are separated and the DNA building blocks that have been added are bonded to each strand. With the help of the enzyme DNA polymerase, new DNA chains are formed and the process can then be repeated. PCR has been of major importance in both medical research and forensic science.
Read more about how Mullis discovered PCR: https://bit.ly/2F53qwS
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