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Combed Single DNA Molecules Imaged by Secondary Ion Mass Spectrometry

Abstract : Studies of replication, recombination, and rearrangements at the level of individual molecules of DNA are often limited by problems of resolution or of perturbations caused by the modifications that are needed for imaging. The Combing-Imaging by Secondary Ion Mass Spectrometry (SIMS) (CIS) method helps solve these problems by combining DNA combing, cesium flooding, and quantitative imaging via the NanoSIMS 50. We show here that CIS can reveal, on the 50 nm scale, individual DNA fibers labeled with different, nonradioactive isotopes and, moreover, that it can quantify these isotopes so as to detect and measure the length of one or more short nucleic acid fragments associated with a longer fiber.
Keywords : chemistry analytical
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Contributor : David GIBOUIN Connect in order to contact the contributor
Submitted on : Tuesday, April 30, 2019 - 3:30:04 PM
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Armelle Cabin-Flaman, Anne-Françoise Monnier, Yannick Coffinier, Jean-Nicolas Audinot, David Gibouin, et al.. Combed Single DNA Molecules Imaged by Secondary Ion Mass Spectrometry. Analytical Chemistry, American Chemical Society, 2011, 83 (18), pp.6940-6947. ⟨10.1021/ac201685t⟩. ⟨hal-02115900⟩



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