LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Conceptual illustration of a double stranded A-DNA (deoxyribonucleic acid) molecule. Compared to B-DNA, the A-DNA form is a wider right-handed spiral, with a shallow, wide minor groove and a narrower, deeper major groove. Atoms are represented as spheres and are colour-coded: carbon (grey), nitrogen (blue), oxygen (red) and phosphorus (orange).
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