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• W2573984120 endingPage "063001" @default.
• W2573984120 startingPage "063001" @default.
• W2573984120 abstract "Fluorescence correlation spectroscopy (FCS) in combination with the super-resolution imaging method STED (STED-FCS), and single-particle tracking (SPT) are able to directly probe the lateral dynamics of lipids and proteins in the plasma membrane of live cells at spatial scales much below the diffraction limit of conventional microscopy. However, a major disparity in interpretation of data from SPT and STED-FCS remains, namely the proposed existence of a very fast (unhindered) lateral diffusion coefficient, ⩾5 µm2 s-1, in the plasma membrane of live cells at very short length scales, ≈⩽ 100 nm, and time scales, ≈1-10 ms. This fast diffusion coefficient has been advocated in several high-speed SPT studies, for lipids and membrane proteins alike, but the equivalent has not been detected in STED-FCS measurements. Resolving this ambiguity is important because the assessment of membrane dynamics currently relies heavily on SPT for the determination of heterogeneous diffusion. A possible systematic error in this approach would thus have vast implications in this field. To address this, we have re-visited the analysis procedure for SPT data with an emphasis on the measurement errors and the effect that these errors have on the measurement outputs. We subsequently demonstrate that STED-FCS and SPT data, following careful consideration of the experimental errors of the SPT data, converge to a common interpretation which for the case of a diffusing phospholipid analogue in the plasma membrane of live mouse embryo fibroblasts results in an unhindered, intra-compartment, diffusion coefficient of  ≈0.7-1.0 µm2 s-1, and a compartment size of about 100-150 nm." @default.
• W2573984120 created "2017-01-26" @default.
• W2573984120 creator A5033116626 @default.
• W2573984120 creator A5033521071 @default.
• W2573984120 creator A5067171744 @default.
• W2573984120 creator A5073935293 @default.
• W2573984120 date "2017-01-13" @default.
• W2573984120 modified "2023-10-12" @default.
• W2573984120 title "Convergence of lateral dynamic measurements in the plasma membrane of live cells from single particle tracking and STED-FCS" @default.
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