Author: "El-Sagheer, Afaf H." / Journal: acs nano - Searchworks@Jio Institute Digital Library Search Results

Author: Bazrafshan, Alisina, primary, Kyriazi, Maria-Eleni, additional, Holt, Brandon Alexander, additional, Deng, Wenxiao, additional, Piranej, Selma, additional, Su, Hanquan, additional, Hu, Yuesong, additional, El-Sagheer, Afaf H., additional, Brown, Tom, additional, Kwong, Gabriel A., additional, Kanaras, Antonios G., additional, and Salaita, Khalid, additional
Published: 2021
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Author: Xavier, Miguel, primary, Kyriazi, Maria-Eleni, additional, Lanham, Stuart, additional, Alexaki, Konstantina, additional, Matthews, Elloise, additional, El-Sagheer, Afaf H., additional, Brown, Tom, additional, Kanaras, Antonios G., additional, and Oreffo, Richard O. C., additional
Published: 2021
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Author: De Fazio, Angela F., primary, El-Sagheer, Afaf H., additional, Kahn, Jason S., additional, Nandhakumar, Iris, additional, Burton, Matthew Richard, additional, Brown, Tom, additional, Muskens, Otto L., additional, Gang, Oleg, additional, and Kanaras, Antonios G., additional
Published: 2019
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Author: Giust, Davide, primary, Lucío, María Isabel, additional, El-Sagheer, Afaf H., additional, Brown, Tom, additional, Williams, Lorraine E., additional, Muskens, Otto L., additional, and Kanaras, Antonios G., additional
Published: 2018
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Author: Kyriazi, Maria-Eleni, primary, Giust, Davide, additional, El-Sagheer, Afaf H., additional, Lackie, Peter M., additional, Muskens, Otto L., additional, Brown, Tom, additional, and Kanaras, Antonios G., additional
Published: 2018
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Author: Hannestad, Jonas K., primary, Brune, Ralf, additional, Czolkos, Ilja, additional, Jesorka, Aldo, additional, El-Sagheer, Afaf H., additional, Brown, Tom, additional, Albinsson, Bo, additional, and Orwar, Owe, additional
Published: 2012
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Author: Börjesson, Karl, primary, Wiberg, Joanna, additional, El-Sagheer, Afaf H., additional, Ljungdahl, Thomas, additional, Mårtensson, Jerker, additional, Brown, Tom, additional, Nordén, Bengt, additional, and Albinsson, Bo, additional
Published: 2010
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Author: Hannestad, Jonas K., Brune, Ralf, Czolkos, Ilja, Jesorka, Aldo, El-Sagheer, Afaf H., Brown, Tom, Albinsson, Bo, and Orwar, Owe
Abstract: We use single-molecule fluorescence microscopy to monitor individual hybridization reactions between membrane-anchored DNA strands, occurring in nanofluidic lipid monolayer films deposited on Teflon AF substrates. The DNA molecules are labeled with different fluorescent dyes, which make it possible to simultaneously monitor the movements of two different molecular species, thus enabling tracking of both reactants and products. We employ lattice diffusion simulations to determine reaction probabilities upon interaction. The observed hybridization rate of the 40-mer DNA was more than 2-fold higher than that of the 20-mer DNA. Since the lateral diffusion coefficient of the two different constructs is nearly identical, the effective molecule radius determines the overall kinetics. This implies that when two DNA molecules approach each other, hydrogen bonding takes place distal from the place where the DNA is anchored to the surface. Strand closure then propagates bidirectionally through a zipper-like mechanism, eventually bringing the lipid anchors together. Comparison with hybridization rates for corresponding DNA sequences in solution reveals that hybridization rates are lower for the lipid-anchored strands and that the dependence on strand length is stronger.
Published: 2013
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