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- W3134859171 abstract "Single-molecule fluorescence detection of protein and other biomolecules requires a polyethylene glycol (PEG)-passivated surface. Individual channels on a PEG-passivated slide are typically used only a few times, limiting the number of experiments per slide. Here, we report several strategies for regenerating PEG surfaces for multiple rounds of experiments. First, we show regeneration of DNA- or RNA-tethered surfaces by washing out the bound protein by 0.1% sodium dodecyl sulfate, which is significantly more effective than 6 M urea, 6 M GdmCl, or 100 μM proteinase K. Strikingly, 10 consecutive experiments in five different systems produced indistinguishable results both in molecule count and protein activity. Second, duplexed DNA unwound by helicase or denatured by 50 mM NaOH was reannealed with a complementary strand to regenerate the duplexed substrate with an exceptionally high recovery rate. Third, the biotin-PEG layer was regenerated by using 7 M NaOH to strip off NeutrAvidin, which can be reapplied for additional experiments. We demonstrate five cycles of regenerating antibody immobilized surface by which three different protein activity was measured. Altogether, our methods represent reliable and reproducible yet simple and rapid strategies that will enhance the efficiency of single-molecule experiments." @default.
- W3134859171 created "2021-03-15" @default.
- W3134859171 creator A5010272295 @default.
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- W3134859171 date "2021-05-01" @default.
- W3134859171 modified "2023-09-29" @default.
- W3134859171 title "Regeneration of PEG slide for multiple rounds of single-molecule measurements" @default.
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- W3134859171 doi "https://doi.org/10.1016/j.bpj.2021.02.031" @default.
- W3134859171 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8204204" @default.
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