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Variable-order fractional MSD function to describe the evolution of protein lateral diffusion ability in cell membranes

Author

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  • Yin, Deshun
  • Qu, Pengfei

Abstract

Protein lateral diffusion is considered anomalous in the plasma membrane. And this diffusion is related to membrane microstructure. In order to better describe the property of protein lateral diffusion and find out the inner relationship between protein lateral diffusion and membrane microstructure, this article applies variable-order fractional mean square displacement (f-MSD) function for characterizing the anomalous diffusion. It is found that the variable order can reflect the evolution of diffusion ability. The results of numerical simulation demonstrate variable-order f-MSD function can predict the tendency of anomalous diffusion during the process of confined diffusion. It is also noted that protein lateral diffusion ability during the processes of confined and hop diffusion can be split into three parts. In addition, the comparative analyses reveal that the variable order is related to the confinement-domain size and microstructure of compartment boundary too.

Suggested Citation

  • Yin, Deshun & Qu, Pengfei, 2018. "Variable-order fractional MSD function to describe the evolution of protein lateral diffusion ability in cell membranes," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 492(C), pages 707-714.
  • Handle: RePEc:eee:phsmap:v:492:y:2018:i:c:p:707-714
    DOI: 10.1016/j.physa.2017.10.030
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