Streptavidin conjugates with gold nanoparticles for DNA visualizationстатья
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Дата последнего поиска статьи во внешних источниках: 17 февраля 2021 г.
Аннотация:Applicability of scanning electron microscopy (SEM) for visualization of individual acts of DNA hybridization with oligonucleotide probes has been investigated using gold nanoparticles as a label. DNA or oligonucleotides were labeled with biotin molecules, which were then detected in DNA duplexes using a streptavidin conjugate with gold nanoparticles. Effective imaging of DNA duplexes was possible using the conjugate prepared by covalent binding. The detection limit of the model oligonucleotide of 19 bases was 20 pg.