Franklin's X-ray diffraction, explanation of X-ray pattern.
How an X-ray diffraction pattern is created and how the DNA X-ray diffraction pattern can be interpreted to give the dimensions. (DNAi location: Code > Finding the Structure > piece of the puzzle > Franklin's X-ray)
This is the X-ray crystallograph pattern of DNA obtained by Rosalind Franklin and Raymond Gosling in 1952. It is know as the B-form. It was clearer than the other X-ray patterns because water was included in the DNA sample. Both James Watson and Francis Crick were struck by the simplicity and symmetry of this pattern. The distinctive "X" in this X-ray photo is the telltale pattern of a helix. Because the X-ray pattern is so regular, the dimensions of the helix must also be consistent. For example, the diameter of the helix stays the same..........
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- ID: 15014
- Source: DNALC.DNAi
How to obtained an X-ray diffraction pattern. Wilkins had a different DNA pattern from Rosalind Franklin. Wilkins provided Franklin with the DNA.
Rosalind Franklin and Raymond Gosling obtained this X-ray diffraction pattern, which triggered the idea that DNA was a helix.
Maurice Wilkins obtained some of the first X-ray diffraction patterns of DNA from which dimensions could be calculated.
Maurice Wilkins talks about obtaining an X-ray diffraction pattern.
James Watson and Francis Crick explain how they solved the structure of DNA. Erwin Chargaff explain how he measured the levels of each of the four nitrogenous bases.
James Watson and Francis Crick solved the structure of DNA. Other scientists, like Rosalind Franklin and Maurice Wilkins, also contributed to this discovery.
Rosalind Franklin in the 1950s.
Animation of 2D DNA model becoming three dimensional.
Image depicting DNA helix model and table.
Raymond Gosling - Rosalind Franklin's graduate student - talks about Franklin's view on model building.