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She identified the two forms of DNA (A and B), which was essential for understanding how DNA behaves. -
She calculated the exact dimensions of DNA, such as the distance between the turns of the helix and the diameter of the molecule. -
The clearest X-ray diffraction image of DNA, which was key to discovering its structure.
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She demonstrated that DNA has a helical shape, thanks to the X-pattern observed in her images.
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Providing the essential data that made the double helix model possible.