Rosalind Franklin

From Grokipedia

Rosalind Elsie Franklin (25 July 1920 – 16 April 1958) was a British biophysicist and X-ray crystallographer whose empirical measurements using X-ray diffraction techniques elucidated the molecular structures of DNA, viruses, and carbon-based materials.

At King's College London from 1951 to 1953, Franklin led the production of high-resolution X-ray diffraction patterns of DNA fibers; Raymond Gosling, a PhD student who had originally worked with Wilkins, was transferred to her supervision, and took the seminal Photograph 51 while under her direction, which displayed the characteristic X-shaped pattern indicative of a helical configuration with precise measurements of its pitch and diameter. These data were shared by her colleague Maurice Wilkins with James Watson and Francis Crick without her knowledge or consent, although such informal sharing was common among collaborating UK crystallography groups in the early 1950s. Upon her departure from King's College in March 1953, Franklin formally transferred her DNA research materials to Wilkins in accordance with the institution's policies on research ownership. This enabled Watson and Crick to construct their double-helix model later that year, though Franklin's independent analyses had already rejected less accurate early models and approached the correct structure through rigorous fiber hydration experiments.

Franklin's insistence on data quality over speculation contrasted with the model-building approach of Watson and Crick, leading to initial underattribution of her foundational role until later historical reassessments; she co-authored key papers acknowledging the helical form and continued refining structural parameters until leaving the DNA project, and subsequently enjoyed cordial professional relationships with both Watson and Crick.

Subsequently, at Birkbeck College, she applied X-ray crystallography to RNA viruses, notably determining the helical structure of tobacco mosaic virus (TMV) and contributing to understandings of its assembly and polymorphism, work that advanced virology despite her premature death from ovarian cancer at age 37, possibly linked to chronic X-ray exposure. Her earlier studies on coal and graphite porosity during World War II further demonstrated her versatility in applying physical chemistry to practical problems.

In brief

Rosalind Elsie Franklin grew up in a prominent Anglo-Jewish family in London and chose science with a precision that left little room for the clubbiness of mid-century labs. She became a master of X-ray diffraction: coal, viruses, and then DNA.

Photograph 51, her image of the B form of DNA, was the picture that made the helix unavoidable. Watson and Crick saw it; the 1962 Nobel did not include her. She had died in 1958, at 37, of ovarian cancer. The later correction of the record is still incomplete in some textbooks and finished in others.

She also did major work on tobacco mosaic virus and coal’s structure. The DNA story is not the only story. It is the one the culture needed to stop getting wrong.

The accomplishment is a photograph and a method. A Jewish scientist in postwar London made the molecule of inheritance visible, and the visibility outlived the slight.