Kary Mullis

Kary Mullis was an American biochemist who revolutionized molecular biology and medical diagnostics with his invention of the polymerase chain reaction (PCR). This technique, which allows for the exponential amplification of specific DNA sequences, earned him the Nobel Prize in Chemistry in 1993. His later career was marked by controversial personal views on topics including HIV/AIDS and climate change, which often overshadowed his monumental scientific achievement.

Early life and education

Kary Banks Mullis was born in Lenoir, North Carolina, and grew up in Columbia, South Carolina, developing an early interest in science. He earned a Bachelor of Science degree in chemistry from the Georgia Institute of Technology in 1966. Mullis then pursued graduate studies in biochemistry at the University of California, Berkeley, where he completed his PhD in 1972 with research on the structure and synthesis of bacterial enterotoxins. Following his doctorate, he conducted postdoctoral research in pediatric cardiology at the University of Kansas Medical Center and in pharmaceutical chemistry at the University of California, San Francisco.

Career and research

After various academic and industry positions, Mullis joined the Cetus Corporation in Emeryville, California, in 1979 as a DNA chemist. It was during his work at Cetus in 1983 that he conceived the fundamental process for the polymerase chain reaction while driving through the California mountains. The technique utilized the DNA polymerase enzyme from the thermophilic bacterium Thermus aquaticus (Taq polymerase) to repeatedly copy a targeted DNA segment through cycles of heating and cooling. This breakthrough, detailed in a seminal 1985 paper in the journal Science, provided an immensely powerful tool for genetic engineering, forensic science, and archaeology. Mullis left Cetus in 1986 and later held positions at Xytronyx, Inc. and served as a director at several biotechnology firms.

Nobel Prize in Chemistry

In 1993, Kary Mullis was awarded the Nobel Prize in Chemistry solely for his invention of the PCR method. The Royal Swedish Academy of Sciences highlighted that his discovery "has fundamentally changed the prerequisites for biochemical and genetic research." He shared the Nobel Prize ceremony that year with Michael Smith, who was honored for his contributions to site-directed mutagenesis. The award solidified PCR's status as one of the most transformative technologies of the 20th century, critical to the success of the Human Genome Project and countless applications in medicine and law.

Controversies and personal views

Mullis was a highly unconventional and controversial figure who openly expressed skepticism towards established scientific consensus. He publicly questioned the AIDS paradigm, disputing the link between HIV and AIDS in interviews and in his autobiography, Dancing Naked in the Mind Field. He also rejected the evidence for human-caused global warming, expressed belief in astrology, and reported personal experiences with extraterrestrial life. These views, combined with his admitted use of LSD and other psychedelics, led to significant criticism from the scientific community, including prominent researchers like Robert Gallo and institutions such as the National Institutes of Health.

Death and legacy

Kary Mullis died of pneumonia on August 7, 2019, at his home in Newport Beach, California. Despite the controversies surrounding his personal beliefs, his scientific legacy is indelible. The polymerase chain reaction became a cornerstone technology for DNA fingerprinting, prenatal diagnosis, the detection of pathogens like the SARS-CoV-2 virus, and basic biological research. The technique's ubiquity was further cemented by its central role in the COVID-19 pandemic for diagnostic testing. Major awards recognizing his work include the Japan Prize, the Robert Koch Prize, and the National Medal of Technology and Innovation.

Category:American biochemists Category:Nobel laureates in Chemistry Category:1944 births Category:2019 deaths