X-ray crystallography of purified DNA fibers shows a pattern that suggests a helical structure,and provides dimensions of that structure.

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X-ray crystallography was the technique used by Rosalind Franklin to obtain patterns of purified DNA fibers, which showed a helical structure and helped provide the dimensions for the structure. While Watson and Crick used Franklin's data to propose the double helix model of DNA, it was Franklin's work with X-ray crystallography that provided the initial evidence for the structure. Hershey and Chase performed experiments with phages to demonstrate that DNA is the genetic material, and Chargaff discovered the base pairing rules of DNA.

X-Ray Crystallography of Purified DNA Fibers Shows a Pattern That