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Publication Archives - LUMICKS

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Highly reproducible single-molecule analysis of transient structures of native proteins using m-Trap® dual optical tweezers combined with Raman spectroscopy

A recent publication by Dai et al. in Nature Communications presents an optical tweezers-coupled Raman spectroscopy platform providing tuneable and reproducible surface-enhanced Raman spectroscopy (SERS) measurements. By combining a Raman microscope with the dual-trap optical tweezers and microfluidic flow chamber of the m-Trap®, the scientists were able to characterize three…
Nelli Bossert
8 April 2021
ROS activation in macrophages optical tweezers fluorescence microscopynews

Early activation of single macrophages captured by the C-Trap®

In a recent article published in Small Methods, researchers reveal a method that uniquely captures the early phase of oxidative stress response in macrophages. Employing the powerful combination of optical tweezers, confocal fluorescent microscopy, and microfluidics of the C-Trap®, they measured the real-time intracellular response of individual macrophages to a…
Nelli Bossert
11 March 2021
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The softening effect of vimentin filament phosphorylation measured with the C-Trap®

A recent study published in the journal Nanoscale shows how post-translational phosphorylation and proteins binding phosphorylated sites regulate the stiffness of vimentin filaments. The researchers combined several analytical approaches and instruments, including the C-Trap® optical tweezers, to define the role of these modifications and interactions on the mechanical properties of vimentin. Apart from contributing…
Santiago Gisler
16 February 2021
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Evaluation of protein droplet viscoelasticity with the C-Trap® reveals new material properties

A recent publication in Science describes a new glass-like structural behavior that protein droplets can adopt, regulating their biochemical behavior as they age. Specifically, through rheological measurements using the C-Trap® optical tweezers, the researchers discovered material properties that may help cells respond to a dynamic molecular environment. The findings offer essential insights into the…
Santiago Gisler
16 February 2021
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Coordinated stimulation of RAD51 filament assembly and growth revealed with the C-Trap®

A recent study published in Molecular Cell used dynamic single-molecule analysis to evaluate the roles of specific proteins involved in the initiating steps of homologous recombination, including nucleation and growth of RAD51 filaments. Specifically, the researchers used the C-Trap® optical tweezers with correlated confocal microscopy to evaluate the roles of RAD51 paralogues and BRCA2…
Santiago Gisler
16 February 2021
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Researchers study the viscoelasticity of human cells as a response to external cues using the high-throughput AFS®

A recent publication in Small introduces you to the value of acoustic force spectroscopy (AFS®) to study the viscoelastic properties of individual cells in high throughput. The authors describe how they used this “plug-and-play” instrument to measure mechanical cell properties upon external cues seamlessly. Romanov et al. specifically assessed how alterations to…
Santiago Gisler
16 February 2021
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New study highlights interconvertible RecA–ssDNA states with the help of u-Flux™ microfluidics

A recent publication in FEBS Letters describes how the presence of ADP and ATP affects the structural transitions that single-stranded DNA (ssDNA) undergoes upon RecA-filament assembly. The researchers used the u-Flux™ Laminar Flow Microfluidics combined with optical tweezers to demonstrate that the bacterial homologous recombination-enzyme exists in two interconvertible states.…
Santiago Gisler
29 October 2020