Maurice Wilkins

Maurice Wilkins was a pioneering biophysicist whose crucial X-ray diffraction work provided the essential data that led to the elucidation of the double-helix structure of DNA. His research, conducted primarily at King's College London, was foundational to the field of molecular biology and earned him a share of the Nobel Prize in Physiology or Medicine in 1962 alongside Francis Crick and James Watson. Despite the later fame of his colleagues' model-building, his meticulous experimental evidence was the critical bedrock for the discovery. His career spanned significant contributions to phosphorescence, the Manhattan Project, and later, neurobiology.

Early life and education

Born in Pongaroa, New Zealand, his family moved to Birmingham, England, when he was six. He attended King Edward's School, Birmingham, before studying physics at St John's College, Cambridge, graduating in 1938. For his PhD, he joined the laboratory of John Randall at the University of Birmingham, researching phosphorescence and writing a thesis on the thermal stability of trapped electrons in crystals. His doctoral work was interrupted by the outbreak of the Second World War, during which he contributed to the improvement of radar screens and later worked on the separation of uranium isotopes for the Manhattan Project at the University of California, Berkeley.

Career and research

After the war, under a fellowship from the Medical Research Council (UK), he joined the University of St Andrews in Scotland before following Randall to King's College London in 1946. Initially studying the effects of ultrasound on DNA, he soon shifted his focus to using X-ray diffraction techniques to investigate the structure of biological molecules. He began producing exceptionally clear diffraction patterns of DNA fibers, work that demonstrated the molecule's crystalline, helical nature. He later applied similar techniques to the study of RNA and the structure of nerve membranes, contributing to the emerging field of neurobiology.

Role in the discovery of DNA structure

His laboratory at King's College London became a world center for DNA research. In 1951, he showed an early, notable X-ray diffraction image to James Watson, sparking Watson's intense interest in the problem. The most critical data came from work conducted by his colleague Rosalind Franklin, who produced the famous "Photo 51" in 1952. Without her knowledge, this image was shown to Watson and Francis Crick at the University of Cambridge, providing the key evidence of the helical parameters. While Franklin's role was initially under-recognized, his own systematic diffraction studies provided the essential confirmation and quantitative data that validated the final double helix model proposed by the Cavendish Laboratory team in 1953.

Later work and recognition

Following the DNA breakthrough, he continued leading the biophysics department at King's College London, turning his attention to the structure and function of RNA and the molecular organization of synapses. His contributions were recognized with numerous honors, including the 1960 Lasker Award and his 1959 election as a Fellow of the Royal Society. The pinnacle was the shared 1962 Nobel Prize in Physiology or Medicine. In later decades, he became an active advocate for social responsibility in science, serving as president of the British Society for Social Responsibility in Science and campaigning against biological weapons and nuclear proliferation.

Personal life and legacy

He married Patricia Ann Chidgey in 1959, and they had four children. A private and somewhat conflicted figure, he expressed regret in his autobiography over the tensions with Rosalind Franklin and the complex ethical dimensions of his wartime work on the Manhattan Project. He passed away in Blackheath, London in 2004. His legacy is firmly embedded in the history of science as the provider of the critical experimental evidence for one of the most important discoveries of the 20th century, which laid the groundwork for modern genetics and genomics. The Royal Society established the Francis Crick Lecture and the Rosalind Franklin Award in a milieu he helped create.

Category:New Zealand scientists Category:English biophysicists Category:Nobel laureates in Physiology or Medicine Category:1916 births Category:2004 deaths