Which King's College scientist's unpublished DNA data influenced Watson and Crick's model?

Which King’s College scientist’s unpublished DNA data influenced Watson and Crick’s model? The scientist was Rosalind Franklin.

Franklin conducted X-ray crystallographic research on DNA at King’s College London. Her measurements helped establish important features of the molecule, including its helical structure, dimensions, and the location of the sugar-phosphate backbones. Her work was especially important for understanding the hydrated B form of DNA.

Her colleague and graduate student Raymond Gosling made Photo 51 in 1952 while working under Franklin’s supervision. The striking X-shaped diffraction pattern indicated a helix. Maurice Wilkins later showed the image to James Watson, while Max Perutz also passed along a report containing Franklin’s experimental findings. Watson and Crick used these data with other chemical and structural evidence.

Franklin’s contribution is often simplified or omitted in popular accounts. She did not simply hand Watson and Crick a finished model, and Photo 51 was not literally taken by Franklin alone: Gosling produced the image. Nevertheless, Franklin’s unpublished data and analysis were crucial evidence in the development of the double-helix model. She died in 1958 and therefore was not eligible for the 1962 Nobel recognition under the committee’s usual practice.