Difference between B-DNA and Z-DNA
Difference between B-DNA and Z-DNA are in tabular form below –
No. |
B-DNA |
Z-DNA |
Definition |
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1. | A form of DNA which is basically right handed DNA, this is referred to as B-DNA. | A form of DNA which is basically left handed DNA, this is referred to as Z-DNA. |
Right or left handed |
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2. | This type of DNA is right handed DNA. | This type of DNA is left handed DNA. |
Turns |
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3. | This DNA include 10 residues per turn. | This DNA include 12 residues per turn. |
Repeating units and Helix pitch |
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4. | In the B-DNA, repeating unit is 1 bp and helix pitch is 34 Å. | In the Z-DNA, repeating units are 2 bp and helix pitch is 45 Å. |
Formation |
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5. | Formation of B-DNA takes place under normal physiological conditions. | Formation of Z-DNA takes place under high salt concentrations. |
More or less common |
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6. | This type DNA is more common. | This type of DNA is less common. |