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- W2914444923 abstract "Adsorption of DNA molecules onto substrate, such as mica, is well documented. However, desorption of the immobilized DNA molecules from substrate, which is also an important aspect of DNA behavior on substrate, has not been paid much attention. Here, DNA molecules were first immobilized on mica surface by using divalent metal ions as the bridge agents. Desorption of the immobilized DNA from mica surface was realized via ethylenediamine tetraacetic acid disodium salt (EDTA) treatment. EDTA is a chelating agent; it can remove the bridging metal ions between DNA and mica, which leads to the release of DNA molecules from mica substrate. The divalent metal ions assisted DNA adsorption onto mica surface and the EDTA induced DNA desorption from mica surface were followed by atomic force microscopy (AFM). Randomly dispersed DNA strands and DNA networks are two distinct adsorption morphologies of DNA on mica surface and their desorption processes from mica surface induced by EDTA are also different. Other factors that influence the EDTA-induced DNA desorption, such as type of bridging metal ion and DNA molecule length, have also been systematically studied. Moreover, EDTA treatment has no effect on the integrity of DNA molecule. The EDTA induced desorption of metal ions immobilized DNA from mica surface is simple and effective, which has potential applications in DNA separation and purification, DNA biophysics, and DNA-based nanotechnology." @default.
- W2914444923 created "2019-02-21" @default.
- W2914444923 creator A5037254124 @default.
- W2914444923 creator A5056939620 @default.
- W2914444923 date "2019-04-01" @default.
- W2914444923 modified "2023-09-23" @default.
- W2914444923 title "Atomic force microscopy study of EDTA induced desorption of metal ions immobilized DNA from mica surface" @default.
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- W2914444923 doi "https://doi.org/10.1016/j.ultramic.2019.01.001" @default.
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