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(Investigative Ophthalmology and Visual Science. 1964;3:1-21.)
© 1964 by The Association for Research in Vision and Ophthalmology, Inc.

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Electron Microscopic Studies of Nucleoside Phosphatase Activity in Blood Vessels and Glia of the Retina

V. T. MARCHESI 1, M. L. SEARS 2, and R. J. BARRNETT 2

1 Departments of Anatomy and Surgery (Ophthalmology), Yale University School of Medicine, New Haven, Conn.; Department of Pathology, Washington University School of Medicine, St. Louis, Mo.
2 Departments of Anatomy and Surgery (Ophthalmology), Yale University School of Medicine, New Haven, Conn.

Nucleoside phosphatase activity was localized to the basement membranes of blood, vessels and to glial cell plasma membranes in the retina with the electron microscope. The endothelial cells lining the small blood vessels were nonreactive in contrast to the endothelium of capillaries in heart and lung. Extensive enzymatic activity was found associated with the interspaces between adjacent glial elements and glial and neuronal elements. These findings are discussed in terms of the possible relationship of this enzymatic activity to permeability phenomena.






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Copyright © 1964 by the Association for Research in Vision and Ophthalmology