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• W1966002783 abstract "Single-particle tracking of biomolecular probes has provided a wealth of information about intracellular trafficking and the dynamics of proteins and lipids in the cell membrane. Conventional mean-square displacement (MSD) analysis of single-particle trajectories often assumes that probes are moving in a uniform environment. However, the observed two-dimensional motion of probe particles is influenced by the local three-dimensional geometry of the cell membrane and intracellular structures, which are rarely flat at the submicron scale. This complex geometry can lead to spatially confined trajectories that are difficult to analyze and interpret using conventional two-dimensional MSD analysis. Here we present two methods to analyze spatially confined trajectories: spline-curve dynamics analysis, which extends conventional MSD analysis to measure diffusive motion in confined trajectories; and spline-curve spatial analysis, which measures spatial structures smaller than the limits of optical resolution. We show, using simulated random walks and experimental trajectories of quantum dot probes, that differences in measured two-dimensional diffusion coefficients do not always reflect differences in underlying diffusive dynamics, but can instead be due to differences in confinement geometries of cellular structures." @default.
• W1966002783 created "2016-06-24" @default.
• W1966002783 creator A5032565575 @default.
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• W1966002783 date "2010-04-01" @default.
• W1966002783 modified "2023-09-26" @default.
• W1966002783 title "Spatial Structure and Diffusive Dynamics from Single-Particle Trajectories Using Spline Analysis" @default.
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• W1966002783 doi "https://doi.org/10.1016/j.bpj.2009.12.4299" @default.
• W1966002783 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2856136" @default.
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