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Immunological evidence that plasma-membrane 5'-nucleotidase is a transmembrane protein

Zachowski, A., Evans, William Howard and Paraf, A. Immunological evidence that plasma-membrane 5'-nucleotidase is a transmembrane protein. Biochimica et Biophysica Acta (BBA) - General Subjects 644 (1) , pp. 121-126. 10.1016/0005-2736(81)90066-3

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Abstract

Antibodies inhibiting specifically plasma membrane-bound 5'nucleotidase were used to determine the disposition of the enzyme in various lymphoma cell lines. Fluorescent Fab fragments of the inhibiting antibodies bound to MF2s and MOPC 173 plasmacytoma cells, whereas no fluorescence was observed with P 1798 thymoma cells in which the enzyme was absent. The relative potency of the antiserum in inhibiting the enzyme in right-side-out and inside-out plasma membrane vesicles prepared from the above cell lines indicated that various group of antigenic determinants were present. One group of antigenic determinants was present at the external face of the cell, and a second was associated with the inner surface of the membrane. A third group of antigenic determinants was located in the vicinity of the active site of the enzyme and it is the group that varied in the various plasmacytoma cells studied. The results are interpreted as immunological evidence that 5'nucleotidase is a transmembrane glycoprotein.

Item Type: Article
Status: Published
Schools: Medicine
Subjects: R Medicine > R Medicine (General)
R Medicine > RZ Other systems of medicine
Publisher: Elsevier
ISSN: 0304-4165
Last Modified: 17 Mar 2021 02:53
URI: https://orca.cardiff.ac.uk/id/eprint/66102

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