Nucleic acid structure
Watson and Crick publish their DNA double-helix model
View full image ↗ How was this image made?
The creative brief sent to the image model. These are instructions, not a record of what actually happened.
Original prompt & settings (JSON) ↗The paper that proposed the double helix ran two journal pages and about 900 words — and it was only the first of three consecutive DNA papers in that issue of Nature.
25 April 1953: two pages in Nature
On 25 April 1953, Nature published James Watson and Francis Crick's 'Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid' — volume 171, pages 737–738, about 900 words.
The paper proposed that DNA consists of two helical chains coiled around the same axis, running in opposite directions, with sugar-phosphate backbones outside and paired bases inside: adenine with thymine, guanine with cytosine. The authors had built the model at Cambridge's Cavendish Laboratory using paper base cutouts and metal pieces from a machine shop.
Three papers, not one
The model did not stand alone. The same issue carried two experimental papers: one from Maurice Wilkins, Alec Stokes and Herbert Wilson, and — two pages after the model — Rosalind Franklin and Raymond Gosling's 'Molecular Configuration in Sodium Thymonucleate.'
The King's College X-ray work behind those papers supplied critical dimensions and evidence of helical structure. The famous diffraction image got its prosaic name, Photo 51, because it was the fifty-first photograph in Franklin and Gosling's series.
The sentence that pointed forward
Watson and Crick closed by pointing out that the specific base pairing immediately suggested a possible copying mechanism for genetic material — a testable claim, not yet a proof. The publication was a proposed model; it did not itself complete the experimental case for DNA's biological function.
The paper's author information carried the date 2 April, but publication came on 25 April. Watson, Crick and Wilkins received the 1962 Nobel Prize in Physiology or Medicine.
Sources
Researched 23 Aug 2026 6 sources 3 audit passes
How this was checked
Researched from the web into a fact sheet, rewritten from that sheet, then audited against it by a different model. How the pipeline works →