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a form of DNA in which the helix is left handed and the overall appearance is elongated and slim.
Farlex Partner Medical Dictionary © Farlex 2012
Z-DNAa structural variant of the predominant form of double-stranded DNA (B-DNA). The backbone of Z-DNA has a zig-zag shape and the helix is left-handed.see DNA STRUCTURE
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005