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Science 22 April 1988:
Vol. 240. no. 4851, pp. 514 - 516
DOI: 10.1126/science.3358130
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Articles

Science, Vol 240, Issue 4851, 514-516
Copyright © 1988 by American Association for the Advancement of Science

articles

Scanning tunneling microscopy of recA-DNA complexes coated with a conducting film

M Amrein, A Stasiak, H Gross, E Stoll, and G Travaglini

Institute for Cell Biology, Swiss Federal Institute of Technology ETH Honggerberg, Zurich, Switzerland.

A link between scanning tunneling microscopy (STM) and conventional transmission electron microscopy has been established for biological material by applying STM on freeze-dried recA-DNA complexes coated with a conducting film. The topography of the complexes observed by means of STM revealed a right-handed single helix composed of about six recA monomers per helical turn.


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