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Cedrick
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08/31/06 - 03:13 PM             #1

a.-double helix to the left
b.-double helix to the right


Cedrick
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08/31/06 - 03:21 PM             #2

b.-helix with turn to the right
thanks for the IM Helena

vallia
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09/04/06 - 03:43 PM             #3

yes , and Z DNA is a left-handed helix. Z from zigzag structure of backbones deoxyribose-phosphate


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Cedrick
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09/06/06 - 06:15 PM             #4

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