Rosalind Franklin

EARLY LIFE AND EDUCATION Rosalind Elsie Franklin was born on July 25, 1920, in London, England. She developed an early interest in science and attended St Paul’s Girls’ School before studying natural sciences, with a focus on chemistry, at Newnham College, Cambridge, from 1938 to 1941. During the Second World War, she joined the British Coal Utilisation Research Association. Her investigations of coal and related carbon materials formed the basis of the doctorate awarded to her by Cambridge in 1945. COAL, CARBON AND X-RAY METHODS Franklin’s early research examined how the internal structure of coal affected its properties. This work had practical importance for understanding fuels and other industrial uses of carbon. After the war, she worked in Paris with Jacques Mering, developing expertise in X-ray diffraction. The technique uses patterns produced when X-rays scatter from a specimen to investigate its structure. Her work on coal and graphite established her reputation before she began studying DNA. DNA RESEARCH AT KING’S COLLEGE LONDON Franklin joined King’s College London in 1951. Working with doctoral student Raymond Gosling, she improved experimental methods for studying DNA fibres and investigated how their diffraction patterns changed with water content. This helped distinguish the A and B forms of DNA. In May 1952, their experiments produced Photograph 51, a particularly clear diffraction pattern of the B form. Its characteristic cross-shaped arrangement provided important evidence of a helical structure. The image was an experimental diffraction pattern, rather than a conventional photograph showing a DNA molecule directly. PHOTOGRAPH 51 AND THE DOUBLE HELIX Franklin’s measurements and analysis were essential contributions to understanding DNA’s structure. Maurice Wilkins showed Photograph 51 to James Watson without Franklin’s knowledge. The photograph and other results from King’s helped Watson and Francis Crick develop their double-helix model. Franklin and Gosling published their own experimental paper in Nature on April 25, 1953, alongside the papers by Watson and Crick and by Wilkins and colleagues. Her contribution involved careful preparation, measurement and interpretation, extending well beyond the production of one famous image. VIRUS RESEARCH AT BIRKBECK In 1953, Franklin moved to Birkbeck College, London, where she built a research group investigating viruses. Working with colleagues including Aaron Klug, she studied tobacco mosaic virus and the arrangement of its RNA and protein components. These investigations helped establish structural virology as an important field. Her later career demonstrates the breadth of her scientific interests and her ability to apply physical methods to biological questions. DEATH AND LEGACY Franklin died in London on April 16, 1958, aged 37. In 1962, Watson, Crick and Wilkins received the Nobel Prize in Physiology or Medicine for their work on nucleic acids; Franklin had already died and received no Nobel Prize. Her research is now widely recognised as fundamental to the history of molecular biology. Her broader legacy includes influential work on carbon materials and viruses, rigorous experimental practice, and continuing discussion about recognition and the sharing of scientific results.