12 | DNA Structure | X-Ray Diffraction Analysis | Photo 51 | Franklin and Astbury experiments

Summary
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The technique had been attempted on  DNA  as early as  1938  by  William Astbury.

By 1947, he had detected a periodicity of 3.4  angstroms  (3.4-Å)  repetitions*  within the structure of the molecule,  which suggested to him that the bases were stacked like coins on top of one another.

Between 1950 and 1953, Rosalind Franklin, working in the laboratory of Maurice Wilkins, obtained improved X-ray data  from  more purified samples of  DNA.
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What is X-ray Diffraction?
X ray Diffraction
Rosalind Franklin's X-ray Diffraction Pattern of DNA
What is X-Ray Crystallography?
Rosalind Franklin: DNA's unsung hero
Wilkins and Franklin
Explainer: X-ray crystallography
Rosalind Franklin: The unsung hero of DNA
Rosalind Franklin's X-ray Diffraction
The Discovery of the Structure of DNA
Rosalind Franklin vs. Watson & Crick
Wilkins and Franklin