டி.என்.ஏ. குரோமோசோம்களுக்குளிருக்கும்
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The Kornberg family, Stockholm, 1959. (L-R) Roger, Kenneth, Sylvy, Arthur, Thomas.
Roger Kornberg in his laboratory, 1970s.
Aaron Klug at a Cold Spring Harbor meeting.
Roger Kornberg, 1980s.
Aaron Klug at a Cold Spring Harbor meeting.
Dean Hewish, 1973.
Leigh Burgoyne, 1973.
Photo of chromatin digested by nuclease, from Hewish and Burgoyne's 1973 experiment.
Electron micrograph of the 10-nm fiber.
Electron micrograph of the 30-nm fiber.
Electron micrograph of the DNA and the protein scaffold left over from one chromosome (insert) with all the histone stripped out.
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![Did you know ?](../images/general/didyouknow.jpg)
Although prokaryotes do not have a nucleus and do not package their DNA as chromatin, there does seem to be some organization to their DNA. This suggests that prokaryotes have proteins that can act like histones.
![Hmmm...](../images/general/hmmm.jpg)
Why did such a system evolve for packaging DNA? Wouldn't it work just as well if the DNA weren't coiled but were laid out in parallel strands like in a fiber optic cable?
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The Kornberg family, Stockholm, 1959. (L-R) Roger, Kenneth, Sylvy, Arthur, Thomas.
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