Kary Mullis

Kary Mullis

Kary Banks Mullis (December 28, 1944 – August 7, 2019) was an American biochemist renowned for his invention of the polymerase chain reaction (PCR), a method used in molecular biology to amplify a single copy or a few copies of a piece of DNA across several orders of magnitude, generating thousands to millions of copies of a particular DNA sequence. This invention revolutionized molecular biology and biochemistry, earning him the Nobel Prize in Chemistry in 1993.

Early Life and Education

Kary Mullis was born in Lenoir, North Carolina, and grew up in a rural setting. He displayed an early interest in science and chemistry. Mullis attended the Georgia Institute of Technology, where he earned a Bachelor of Science degree in chemistry in 1966. He then pursued further studies at the University of California, Berkeley, earning a Ph.D. in biochemistry in 1972. His doctoral research focused on peptide synthesis, laying the groundwork for his future contributions to science.

Career and Research

After completing his Ph.D., Mullis conducted postdoctoral research in pediatric cardiology at the University of Kansas Medical School. In 1977, he began working as a DNA chemist at Cetus Corporation, one of the first biotechnology companies, where he invented the PCR technique in 1983. This groundbreaking method allowed for the rapid and inexpensive duplication of DNA sequences, which was previously a time-consuming and costly process.

Mullis's invention of PCR had a profound impact on the field of molecular biology, enabling scientists to conduct experiments that were previously impossible. It has applications in various areas, including genetic testing, the detection of pathogens in infectious diseases, and the analysis of ancient DNA samples. In recognition of his invention, Mullis was awarded the Nobel Prize in Chemistry in 1993, alongside Michael Smith, who was honored for his contributions to site-directed mutagenesis.

Beyond PCR, Mullis was involved in other scientific endeavors, including research on the human immunodeficiency virus (HIV) and the development of photo-PCR, a method to enhance PCR efficiency using light.

Controversies

Despite his scientific achievements, Mullis was a controversial figure. He expressed skepticism about the scientific consensus on climate change and questioned the link between HIV and AIDS, positions that attracted criticism from the scientific community. Mullis's views on these and other topics were often seen as diverging from mainstream scientific opinions.

Personal Life and Death

Mullis was known for his eccentric personality and unconventional thinking. He was an avid surfer and passionate about nature. Kary Mullis passed away on August 7, 2019, from complications related to pneumonia. His legacy is marked by his revolutionary contribution to molecular biology, despite the controversies that surrounded his personal views.

Legacy

Kary Mullis's invention of PCR has left an indelible mark on the scientific world. It is considered one of the most important scientific advancements of the 20th century, with widespread applications in medicine, forensic science, and biological research. Mullis's work has enabled significant progress in areas such as genetic testing, the diagnosis of infectious diseases, and the understanding of genetic disorders.