DNA double helix Performed Volkova A V

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DNA double helix Performed Volkova A. V.

In the 50 years of the twentieth century, the structure of DNA was studied three groups of researchers: • Linus Pauling. California Institute of Technology (USA) • Maurice Wilkins. King's College London • James Watson and Francis Crick. Cambridge

In the group of M. Wilkins, Rosalyn Franklin to succeed in these studies. Rosalyn Franklin (1920 -1958) An X-ray crystal DNA obtained Rosalyn Franklin in 1952.

Mance unsafe at the time, for human life form experimentation - X-ray structural analysis, she has proven to my colleagues that DNA is invisible miracle of nature, uniting a man and Drosophila and the nematode worm, is not a single, as insists hurry Linus Pauling, a spiral shape, and double.

$Franklin, X-ray diffraction studies of DNA, identified A-and B-form DNA. She then calculated the$

Franklin, X-ray diffraction studies of DNA, identified A-and B-form DNA. She then calculated the Patterson function and, using a special method of superposition, showed that the phosphate groups must be located outside of the DNA molecule. Based on these results, this group came to the conclusion that DNA is a double helix shape, resembling a spiral staircase. Crick and Watson had developed a model of the spatial structure of the DNA molecule.

In 1962, this discovery earned them the Nobel Prize, and marked the beginning of science, "molecular biology"

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