Thermal hysteresis activity of antifreeze proteins: A model based on fractional statistics theory of adsorption

J.I. Lopez Ortiz, E. Quiroga, C.F. Narambuena, J.L. Riccardo and A.J. Ramirez-Pastor

Physica A: Statistical Mechanics and its Applications, 2021, vol. 575, issue C

Abstract: Antifreeze proteins (AFPs) adsorb to the surface of embryonic ice crystals to prevent their growth. The protein-ice adsorption lowers the freezing point of the solution. Then, a thermal hysteresis can be defined as the difference between the melting and freezing temperatures. This quantity is a measure of the antifreeze protein activity. In this sense, there exists evidence that the antifreeze activity enhances with increasing the area/length of the ice-binding sites. In order to interpret this thermal hysteresis behavior, we introduce a two-dimensional adsorption model based on fractional statistics theory. The analytical expressions are obtained in terms of an exclusion parameter, which depend on the structure of the protein and area of the ice-binding sites. By using the model, thermal hysteresis activity is calculated for AFPs of different size, shape and number of active sites. The theoretical results show a good qualitative agreement with reported experimental data in the literature.

Keywords: Equilibrium thermodynamics and statistical mechanics; Lattice-gas models; Fractional statistics theory; Thermal hysteresis activity; Antifreeze proteins (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:575:y:2021:i:c:s0378437121003198

DOI: 10.1016/j.physa.2021.126046

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