Fast Directions:
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Paste a DNA sequence longer than 146 characters
 over all the text in this box and click go.

Detailed Information:
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The sequence must be greater than 147 characters to accommodate a nucleosome. Shorter sequences produce only an ideal B-form dsDNA structure.  The energy landscape and other data are returned quickly for 1000-2000bp but Jmol takes awhile to display.
 
On 'go' a  separate window opens with a nucleosome energy level diagram and two Jmol panels. The red bars on the energy level diagram indicate nucleosome positions.

One panel will contain a molecular model of the ideal shape of nucleosome free dsDNA and the other will contain the folded conformation.  

By default 50% of the possible positions are occupied using the lowest energy positions inthe energy level diagram. Change the linker length and the percent occupancy using the options below.  

Setting the 'Percent Occupancy'  to '0' results in a regular packing of nucleomes separated by the specified linker length. The energy landscape is ignored in this case.