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The Journal of General Physiology, Vol 36, 29-37, Copyright © 1952 by The Rockefeller University Press


ARTICLE

A STUDY ON THE STRUCTURAL PROTEIN OF THE VITREOUS BODY (VITROSIN)

A. Gedeon Matoltsy 1

1 From the Retina Foundation, Massachusetts Eye and Ear Infirmary, Department of Dermatology, Harvard Medical School, and Dermatological Laboratories, Massachusetts General Hospital, Boston

A method is described for the isolation of a structural protein of the vitreous body, which has been named vitrosin. The analyses show that vitrosin is a viscous, thixotropic, fibrous protein. Electron micrographs reveal that vitrosin particles are long fibrils, averaging 250 A in width. The isoelectric point was found to be around pH 5.5 and the shrinkage temperature 60°C. Vitrosin is composed of a protein-carbohydrate complex. It contains cystine and the aromatic amino acids in low quantities. Hexosamine could not be detected in the complex.

Submitted on April 1, 1952


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