Summary of Dorothy Crowfoot Hodgkin’s Crystalline Chemistry, Part 2

Overview of Dorothy Crowfoot Hodgkin’s Crystalline Chemistry, Part 2

This episode continues the story of Dorothy Crowfoot Hodgkin, tracing her rise from a young Oxford chemistry graduate to a pioneering crystallographer whose X-ray work revealed the structures of major biological molecules like penicillin, vitamin B12, and insulin. Alongside her scientific breakthroughs, the episode highlights her lifelong pacifism, socialist politics, internationalism, advocacy for women in science, and the ways she balanced a demanding career with marriage, motherhood, and severe rheumatoid arthritis.

Key Scientific Breakthroughs

Protein crystallography begins

• While at Cambridge with J.D. Bernal, Hodgkin helped launch a major new direction in science by applying X-ray crystallography to biological molecules.
• A turning point came in 1934 when Bernal realized that keeping protein crystals wet in their mother liquor produced usable diffraction patterns.
• Their Nature paper on crystalline pepsin is presented as the beginning of protein crystallography.

Early work on insulin and sterols

• Hodgkin’s PhD research focused on sterols, including cholesterol.
• She published a solo Nature paper in 1935 on insulin crystals, beginning her decades-long effort to solve insulin’s structure.

Penicillin during World War II

• Penicillin became a wartime priority, and Hodgkin took on the challenge of determining its structure.
• Using partial data and eventually suitable crystals from the U.S., she and her team worked in three dimensions to solve the molecule’s configuration.
• She confirmed the structure on May 8, 1945, the same day Victory in Europe was declared.
• Her work was not publicly presented until 1945 and not published until 1949, partly due to wartime secrecy and pharmaceutical trade concerns.

Vitamin B12 and insulin

• In 1948, Hodgkin was given “anti-pernicious anemia factor,” now known as vitamin B12.
• Solving its structure took eight years and required emerging computer technology to handle the calculations.
• In 1969, after years of work and international collaboration, her team solved the structure of insulin, a molecule containing 788 atoms.

Personal Life and Health

Marriage to Thomas Hodgkin

• Hodgkin met Thomas Lionel Hodgkin in 1937; they shared pacifist, left-wing, and anti-imperialist views.
• They married after only a few months and lived much of their marriage separately due to work, but maintained constant correspondence.
• Dorothy continued publishing under “Dorothy Crowfoot” until 1949.

Motherhood and academic precedent

• She became pregnant shortly after marrying and was granted what is described as Oxford’s first paid maternity leave.
• Her first child, Luke, was born in 1938; Elizabeth followed in 1941; Toby in 1946.
• The family relied on nurses and household help so both parents could keep working.

Rheumatoid arthritis

• Hodgkin developed severe rheumatoid arthritis beginning in the 1930s.
• The illness caused chronic pain, hand deformities, and increasing disability, eventually requiring equipment modifications in the lab and later a wheelchair.
• Despite this, she remained active in research, teaching, travel, and activism for much of her life.

Politics, Internationalism, and Activism

A scientist with strong convictions

• Hodgkin and her husband were both committed to pacifism and left-wing politics.
• She signed anti-militarization letters and generally supported activists, while focusing her own energy on the lab.
• She believed science should remain open across political divisions and supported collaboration even with scientists from communist countries.

Rejection by the U.S. and Soviet trip

• In 1953, the U.S. State Department barred her from entry, likely due to her political associations.
• She later traveled to the Soviet Union with Bernal, though the episode notes she was somewhat naive about Stalinist realities.

Advocacy after the Nobel Prize

• After becoming internationally famous, she used her platform more openly to oppose war, imperialism, and nuclear weapons.
• She was often careful and nonconfrontational in style, preferring direct dialogue over public confrontation.

Major Honors and Public Recognition

Nobel Prize in Chemistry

• In 1964, Hodgkin won the Nobel Prize in Chemistry for determining the structures of important biochemical substances using X-ray techniques.
• She was the third woman ever to win the Chemistry Nobel, after Marie Curie and Irène Joliot-Curie.
• She learned of the award while visiting Thomas in Ghana, and the news reached her through reporters because the official telegram had gone elsewhere.

Other honors

• She became a Fellow of the Royal Society in 1947.
• She received the Order of Merit in 1965.
• She later received the Copley Medal in 1976, becoming the first woman to do so.
• In 1987, she received the Soviet Lenin Peace Prize.

Later Career and Leadership

Building institutions

• Hodgkin helped found the International Union of Crystallography in 1948 and insisted it remain truly international, including scientists from the Soviet bloc.
• She became president of the Union in 1972 and worked to bring China back into the organization.
• She also served as president of the Pugwash Conferences on Science and World Affairs from 1975 to 1988.

Oxford, Bristol, and women in science

• She advocated for equal pay for women in her lab.
• In 1970, she became Chancellor of the University of Bristol and used the role to support funding and student concerns.
• She helped establish the Bristol Centre of Advanced Architecture after funding cuts threatened the department.

Legacy and Final Years

Family and grief

• Thomas Hodgkin died in 1982.
• Their marriage had been unconventional and often long-distance, and Dorothy was deeply affected by his death.
• Her health declined further afterward.

Final years

• She continued to travel and advocate where possible, even into old age.
• In 1988, she published her last paper on insulin at age 78.
• After a fall and broken hip in 1990, she required round-the-clock care.
• She died in 1994 at age 84, after another broken hip.

Lasting impact

• Hodgkin was remembered as brilliant, gentle, and deeply humane.
• Her students spread crystallography around the world, establishing labs in places including China, India, and New Zealand.
• The Royal Society’s Dorothy Hodgkin Fellowship now supports early-career scientists who need flexible working conditions, reflecting her legacy of both scientific excellence and accessibility.

Notable Takeaways

• Dorothy Crowfoot Hodgkin was not only a foundational figure in structural biology, but also a model of persistence under physical, political, and institutional pressure.
• Her work helped transform crystallography from a niche technique into a central tool for understanding life’s molecules.
• She consistently tied scientific progress to social responsibility, international cooperation, and peace activism.
• The episode presents her as a scientist who combined rigor, generosity, and moral conviction in equal measure.