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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 '14 at 12:04
Just guessed it.. It resembled the textbook diagram of Holliday junction. :) – WYSIWYG Jan 25 '14 at 12:05
This is a pretty well known image and you definitely come across it, when you study in this direction. – Chris Jan 25 '14 at 15:20

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