Beebe TP, Wilson TE, Ogletree DF, Katz JE, Balhorn R, Salmeron MB, Siekhaus WJ. Direct observation of native DNA structures with the scanning tunneling microscope.
Science 1989;
243:370-2. [PMID:
2911747 DOI:
10.1126/science.2911747]
[Citation(s) in RCA: 165] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Uncoated double-stranded DNA dissolved in a salt solution was deposited on graphite and imaged in air with the scanning tunneling microscope (STM). The resolution was such that the major and minor grooves could be distinguished. The pitch of the helix varied between 27 and 63 angstroms in the images obtained. Thus the STM can be useful for structural studies of a variety of uncoated and isolated biomolecules.
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