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Medical Products Department
E.I. du Pont de Nemours & Co.
Wilmington, Del.
" Two recent papers deal with the structure of DNA, which continues to be of vital importance in molecular biology. Studies on the biophysical properties of paralled stranded DNA and the X-ray determination of a synthetic DNA hairpin in the Z helix form have revealed basic principles of helix formation.

R. Chattopadhyaya, S. Ikuta, K Grzeskowiak,...

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