Aaron Klug

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Lore & Background

After his PhD, Klug joined Birkbeck College, working with Rosalind Franklin and John Desmond Bernal. This sparked a lifelong interest in viruses, leading to discoveries on tobacco mosaic virus structure. Franklin died of ovarian cancer at age 37 in 1958, and Klug continued her research, winning the Nobel Prize in Chemistry in 1982. In 1962 he moved to the Medical Research Council Laboratory of Molecular Biology in Cambridge, where he developed crystallographic electron microscopy, studied transfer RNA, identified zinc fingers, and investigated neurofibrils in Alzheimer's disease.

Reader's Guide

Aaron Klug's significance lies in his development of crystallographic electron microscopy, a technique that combines two-dimensional images of crystals from multiple angles to produce three-dimensional structures. This method revolutionized the study of biological macromolecules, enabling detailed visualization of nucleic acid-protein complexes. His work on spherical viruses, alongside D. Caspar, established a general theory of viral shell structure, verified by X-ray and electron microscope studies. Klug's contributions extended to the discovery of zinc fingers, key motifs in gene regulation, and to research on Alzheimer's disease neurofibrils. As director of the MRC Laboratory of Molecular Biology, he oversaw a period of major scientific advances.

Did You Know?

• Aaron Klug continued Rosalind Franklin's research on viruses after her death in 1958 and won the Nobel Prize in Chemistry in 1982.
• Klug developed crystallographic electron microscopy, a technique that reconstructs three-dimensional structures from two-dimensional images.
• He was a key advocate for founding the Wellcome Sanger Institute, which supported the Human Genome Project.

The Birkbeck Virus Lab

When Rosalind Franklin relocated to Birkbeck College in 1953, she brought with her a vision for understanding the molecular architecture of viruses. Working under the guidance of John Desmond Bernal, she assembled a research group dedicated to this pioneering line of inquiry. Aaron Klug was among the team members who joined her in this endeavour, contributing to a programme that would examine the structural principles governing viral particles. The laboratory's focus on viruses such as tobacco mosaic virus placed it at the frontier of a field still in its infancy. For Klug, this period represented an immersion in the kind of hands-on structural biology that Franklin championed — a discipline demanding both rigorous experimental technique and imaginative interpretation of diffraction data. The Birkbeck environment, distinct from the more politically fraught atmosphere at King's College where Franklin had previously worked, offered a setting in which her virus research could flourish. Klug's presence in that group meant he absorbed not only the scientific methods but also the intellectual ethos Franklin cultivated around her team.

Inheriting an Unfinished Structure

Franklin's life was cut short in 1958 when she died of ovarian cancer at the age of thirty-seven. The timing was devastating: she had been scheduled to unveil the structure of tobacco mosaic virus at an international fair in Brussels, and she passed away the day before that presentation. The loss left the Birkbeck virus research programme without its driving force, but it did not extinguish the work itself. Aaron Klug, who had been part of Franklin's team, stepped forward to continue the research trajectory she had established. The task was not merely to replicate her methods but to carry forward the structural questions she had posed about how viruses assemble and function at the molecular level. For Klug, this meant taking on a legacy that was both scientifically demanding and emotionally weighted — the knowledge that his mentor had been denied the chance to present her findings to the wider world. The continuation of that virus-structure programme became, in part, an act of scholarly fidelity to Franklin's unfinished vision.

The 1982 Nobel Prize in Chemistry

Twenty-four years after Rosalind Franklin's death, Aaron Klug was awarded the Nobel Prize in Chemistry in 1982. The recognition was a direct outgrowth of the virus-structure research he had inherited and extended from the Birkbeck group Franklin had led. That Franklin's own contributions to virology had been appreciated during her lifetime — unlike her DNA work, which remained largely unrecognised until after her death — made Klug's Nobel a particularly resonant validation of the broader Birkbeck programme. The prize confirmed that the structural questions Franklin had posed about viral architecture were not merely academic curiosities but foundational to our understanding of molecular biology. For Klug, the award carried the weight of a lineage: it acknowledged not only his own decades of work but also the intellectual foundation laid by a woman whose career was truncated by illness in her late thirties. In a field where credit often accrues to the last name on a paper, Klug's Nobel served as a reminder of the collaborative, generational nature of scientific discovery.

A Lineage of Recognition

The story of Aaron Klug's Nobel Prize is inseparable from the broader narrative of how Rosalind Franklin's contributions have been received over time. Franklin's work on coal and viruses was acknowledged during her lifetime, a fact that stands in stark contrast to the treatment of her DNA research, for which she has been called the 'forgotten heroine' and the 'dark lady of DNA.' Klug's 1982 Chemistry Nobel, rooted in the virus-structure work he continued from Franklin's Birkbeck group, thus occupies a unique position: it is a Nobel that, in a very real sense, honours a line of inquiry she initiated. James Watson himself noted that Franklin would ideally have received a Nobel in Chemistry had she lived. Klug's prize, arriving two and a half decades after her death, can be read as a partial answer to that counterfactual — a recognition that the molecular-structure questions she championed at Birkbeck were among the most consequential in twentieth-century science. His achievement stands as both a personal triumph and a testament to the enduring power of Franklin's scientific vision.