Proposed correction to Feder's anomalous diffusion FRAP equations.
Proposed correction to Feder's anomalous diffusion FRAP equations.
复制标题
建议对 Feder 的反常扩散 FRAP 方程进行修正。
DOI:
10.1016/j.bpj.2010.11.091
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发表时间:
2011
影响因子:
3.4
通讯作者:
Kenworthy,AnneK
中科院分区:
文献类型:
--
作者:
Kang,Minchul;DiBenedetto,Emmanuele;Kenworthy,AnneK
In an important research article in Biophysical Journal, Feder et al.(1) introduced the idea that proteins in cell membranes undergo a form of restricted, time-dependent lateral mobility due to anomalous diffusion. In doing so, they provided a plausible explanation for why the presence of the so-called immobile fraction is often required to fully describe fluorescence recovery after photobleaching (FRAP) measurements when a free-diffusion model is used to fit the data. These findings helped to shape current models of cell-membrane organization, and models incorporating anomalous diffusion have subsequently been applied more generally to other cellular compartments as well.Feder et al. started with the assumption that the meansquared displacement (MSD; hx 2i) of anomalously diffusing molecules is related to a certain power of time by hx2i ¼ Gta, where G and a are referred to as a transport coefficient and an anomalous exponent, respectively. By analogy to the relationship between the MSD and diffusion coefficient D for purely diffusing molecules in R 2, hx2i ¼ 4Dt, the authors introduced a time-dependent diffusion coefficient as
影响因子:
3.4
作者:
Jianrong Wu;K. Berland
通讯作者:
Jianrong Wu;K. Berland
影响因子:
3.3
作者:
Breckenridge, Mark T.;Dulyaninova, Natalya G.;Egelhoff, Thomas T.
通讯作者:
Egelhoff, Thomas T.
影响因子:
3.4
作者:
Feder, TJ;BrustMascher, I;Webb, WW
通讯作者:
Webb, WW