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What I understand is- I think this is picture of DNA. But why is it in this conformation ? What types of cells have this type of DNA ?

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up vote 4 down vote accepted

It is called a Holliday junction. It forms during recombination.

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Well, I am curoius - how did you find this out ?! –  biogirl Jan 25 at 12:04
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Just guessed it.. It resembled the textbook diagram of Holliday junction. :) –  WYSIWYG Jan 25 at 12:05
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This is a pretty well known image and you definitely come across it, when you study in this direction. –  Chris Jan 25 at 15:20
    
people are upvoting this answer.. this is not a quiz where there are prizes for answering first :P –  WYSIWYG Jan 26 at 12:45

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