June 1976
Volume 15, Issue 6
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Articles  |   June 1976
Stromal sodium binding after glycosaminoglycan digestion.
Investigative Ophthalmology & Visual Science June 1976, Vol.15, 484-486. doi:https://doi.org/
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      K Green, S Downs, K Bowman; Stromal sodium binding after glycosaminoglycan digestion.. Invest. Ophthalmol. Vis. Sci. 1976;15(6):484-486. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

The glycosaminoglycans of isolated rabbit corneal stroma, clamped between two lucite plates at near normal hydration, were digested with testicular hyaluronidase in saline solution. After equilibration with 0.9 per cent saline solution alone the sodium and chloride content of the stroma was determined. Chloride was in equilibrium with both normal and hyaluronidase-treated stroma, allowing use of the Donnan calculation for excess or bound sodium to be made. Normal stromas contained 200 mEq. bound sodium per kilogram of dry weight calculated from the Donnan calculation; hyaluronidase-treated stromas contained 110 mEq. bound sodium per kilogram of dry weight. The data show that about half of the bound sodium in the corneal stroma is on nonsaccharide binding sites. Quantitative verification of the loss of glycosaminoglycans was performed.

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