期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 110, 期 9, 页码 4430-4433出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp0569638
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High-resolution scanning tunneling microscopy (STM) imaging of single double-stranded poly(G)-poly(C) DNA molecules, made by a novel synthesis method, shows the molecules morphology. The STM images reveal a periodic structure of similar to 4 nm, seen as repeating bulbs along the molecules. These bulbs are associated with the molecule helix (the major grooves). Nicks, two per 100 nm on the average, are observed along the DNA as well. The STM measurements were supported by a morphological statistics of the DNA molecule groove length and apparent height relative to the surface.
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