Rosalind Franklin: DNA's Hidden Hero

The Photograph That Changed Biology

In May 1952, a thirty-one-year-old scientist at King’s College London placed a fiber of DNA in front of an X-ray beam and exposed photographic film for over sixty hours. The resulting image — labeled Photo 51 — was stunningly clear. An X-shaped pattern of dark spots, it was the fingerprint of a helix. It was, as one historian later put it, “the most important photograph ever taken.”

Rosalind Elsie Franklin had just captured the structure of life itself. But she would not live to receive the recognition she deserved.

A Jewish Family of Purpose

Franklin was born on July 25, 1920, into a prominent and prosperous Anglo-Jewish family in London. The Franklins were bankers, scholars, and public servants. Her great-uncle, Herbert Samuel (later Viscount Samuel), was the first practicing Jew to serve in the British Cabinet and later became the first High Commissioner of Palestine.

The family was deeply committed to Jewish communal life and social responsibility. Rosalind’s father, Ellis Franklin, was a partner at the family bank and was actively involved in Jewish refugee organizations during the 1930s, helping Jews fleeing Nazi Germany settle in Britain. Education was paramount — both boys and girls in the Franklin family were expected to excel academically.

Rosalind decided to become a scientist at age fifteen. She attended St. Paul’s Girls’ School, one of the few schools that taught physics and chemistry to girls, and then went to Cambridge, where she studied natural sciences at Newnham College. At Cambridge, she experienced both the thrill of serious science and the frustration of institutional sexism — women could attend lectures and take exams but were not awarded full degrees until 1948.

The Road to Photo 51

After Cambridge, Franklin did war-related research on coal and carbon structures, work that earned her a PhD and established her expertise in X-ray crystallography. She then spent three productive years in Paris, where she refined her crystallographic techniques and thrived in the more egalitarian atmosphere of French science.

In 1951, she joined King’s College London to work on DNA. It was here that things went wrong — not scientifically, but personally and politically. Franklin’s colleague Maurice Wilkins believed she had been hired as his assistant. She believed she had been hired as an independent researcher. The misunderstanding poisoned their relationship.

Despite the hostile atmosphere, Franklin produced extraordinary work. Her X-ray images of DNA were the best in the world. She had identified two forms of DNA (A and B), determined the dimensions of the molecule, and was methodically working toward the structure. Photo 51, her image of the B form, was the clearest evidence that DNA was a helix.

The Double Helix Controversy

In January 1953, without Franklin’s knowledge, Wilkins showed Photo 51 to James Watson. Watson immediately recognized its significance. He and Francis Crick, working at Cambridge, used Franklin’s data — including unpublished measurements from a Medical Research Council report — to build their famous model of the double helix, published in Nature in April 1953.

Franklin’s own paper appeared in the same issue of Nature, but it was presented as merely supporting Watson and Crick’s model, rather than as the foundational evidence it actually was. Watson and Crick’s paper included only a vague acknowledgment of having been “stimulated by” Franklin’s work.

Watson later compounded the injustice in his memoir The Double Helix (1968), where he portrayed Franklin — whom he called “Rosy,” a nickname she hated — as a difficult, dowdy woman who didn’t understand her own data. The portrayal was sexist, inaccurate, and deeply unfair.

Tobacco Mosaic Virus and Final Years

After leaving King’s College in 1953, Franklin moved to Birkbeck College, where she did groundbreaking work on the structure of the tobacco mosaic virus and the polio virus. This work was arguably as important as her DNA research and established her as one of the leading structural biologists of her generation.

In 1956, Franklin was diagnosed with ovarian cancer, possibly caused by her extensive exposure to X-rays. She continued working through her illness with remarkable determination, publishing seventeen papers in her final two years. She died on April 16, 1958, at the age of thirty-seven.

Four years later, Watson, Crick, and Wilkins received the Nobel Prize in Physiology or Medicine for discovering the structure of DNA. Franklin’s contribution was barely mentioned.

Legacy and Justice

In recent decades, Franklin’s reputation has been dramatically rehabilitated. Historians have documented how her data was used without her consent and how her contributions were systematically minimized. She is now recognized as one of the most important scientists of the twentieth century — a Jewish woman who overcame prejudice and institutional barriers to produce work of lasting significance.

Her story resonates with Jewish themes of justice and memory. The Jewish tradition insists that we name our sources — kol ha’omer davar b’shem omro (whoever reports something in the name of its author brings redemption to the world). Franklin’s story is a reminder of what happens when that principle is violated, and of the importance of setting the record straight, even decades after the fact.