| Z-DNA | zig-zag (left-handed helical) deoxyribonucleic acid |
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| Z-DNA | <molecular biology> A form of DNA, or a region of DNA, in which the helix is flipped into a lefthanded helix, characterised by alternating purines and pyrimidines. This region is thought to be the target of a DNA-binding protein. (20 Jun 2000) |
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| Z-DNA |
A form of DNA duplex in which the double helix is wound in a left-hand, instead of a right-hand, manner. DNA adopts the Z configuration when purines and pyrimidines alternate on a single strand, eg,
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