Nature 171, 737-734(1953)(C)Macmillan Publishers Ltd Molecular structure of nucleic acids WatSON..d. CRiCKfh c Medical research Council Unit for the study of Molecular Structure of Biological Systems, Cavendish Laboratory, Cambridge A Structure for Deoxyribose This figure is purely Nucleic Acid diagrammatic The two ribbons We wish to suggest a structure for symbolize the the salt of deoxyribose nucleic acid two phophate sugar chains, and (D.N.A.). This structure has novel the horizonal features which are of considerable rods the pairs of bases holding the biological interest chains together The vertical line marks the fibre axIsNature 171, 737-734 (1953) (C) Macmillan Publishers Ltd. Molecular structure of Nucleic Acids WATSON, J. D. & CRICK, F. H. C. Medical Research Council Unit for the Study of Molecular Structure of Biological Systems, Cavendish Laboratory, Cambridge. A Structure for Deoxyribose Nucleic Acid We wish to suggest a structure for the salt of deoxyribose nucleic acid (D.N.A.). This structure has novel features which are of considerable biological interest. Figure 1 This figure is purely diagrammatic. The two ribbons symbolize the two phophate- sugar chains, and the horizonal rods the pairs of bases holding the chains together. The vertical line marks the fibre axis