LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Conceptual illustration of a double stranded Z-DNA (deoxyribonucleic acid) molecule. In the Z-DNA the strands turn about the helical axis in a left-hand spiral, the opposite of the more common B-DNA form. Atoms are represented as spheres and are colour-coded: carbon (grey), nitrogen (blue), oxygen (red) and phosphorus (orange).
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