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- 1New paper reexamines Rosalind Franklin's Photograph 51 of DNA●Photograph 49 is the key to understanding Rosalind Franklin’s DNA Photograph 51
A new historical study argues that Photograph 49, an earlier X-ray diffraction image taken in Rosalind Franklin's lab at King's College London, is essential to correctly interpreting the famous Photograph 51 that contributed to the discovery of DNA's double helix. Researchers and science historians are debating what the finding means for the long-told story of how DNA's structure was solved and Franklin's role in it.