Abstract
Diffusion of water within cross-linked tetragonal crystals of hen egg-white lysozyme has been measured and simulated on a computer using the X-ray structure of water-filled channels within the crystal lattice. Relative to the self-diffusion coefficient of bulk water molecules, the experimental diffusion coefficient of water within the crystal was found to be 13 times reduced in the (001) crystallographic plane and 5 times reduced in the [001] direction. Comparison of the experimental and computer simulated diffusion coefficients shows that steric limitations for water diffusion are mostly responsible for this reduction of the water diffusion in the crystal, with the self-diffusion coefficient of intracrystalline water reduced by no more than 30–40% as compared to that of bulk water.
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Morozov, V.N., Kachalova, G.S., Evtodienko, V.U. et al. Permeability of lysozyme tetragonal crystals to water. Eur Biophys J 24, 93–98 (1995). https://doi.org/10.1007/BF00211404
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DOI: https://doi.org/10.1007/BF00211404