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Dr. Mullis received the Nobel Prize in chemistry in 1993, for his invention of the polymerase chain reaction (PCR). The process, which Dr. Mullis conceptualized in 1983, is hailed as one of the monumental scientific techniques of the 20th century, one that revolutionized genetic science and engineering. PCR has also been an enormous commercial success. The original patent was sold to Hoffman LaRoche for $300 million and has generated more than a billion dollars in revenue from royalties. | 