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Comparative analysis of the membrane proteins and their specificities in neurons, protoplasmic astrocytes, and oligodendrocytes from rat brain

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Abstract

Plasma membranes from neuronal perikarya (N), protoplasmic astrocytes (A) and oligodendrocyies (O) of rat brains were analysed with respect to their protein and glycoprotein contents and specificities. SDS-polyacrylamide gel electrophoresis revealed a total number of 23, 17, and 17 major proteins in N, A, and O respectively. Periodate-Schiff's staining showed that approximately 40–60% of these proteins were glycoproteins. The reactivity of these glycoproteins to Con A and WGA was also studied. Selective iodination of whole cells followed by electrophoresis and autoradiography indicated that of the major proteins, only 25% of neuronal and 60% of astroglial and oligodendroglial membrane proteins were exposed outside the cell surface. The overall results suggest that membrane proteins of each of the three cell types studied here have characteristically different internal and external markers differing in size, glycoprotein content, and reactivity of the glycoproteins to lectins.

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Authors and Affiliations

  1. Department of Cell Biology, Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road Jadavpur, 700 032, Calcultta, India

    Mira Sil, Diptendu Chatterjee & Pranab Kumar Sarkar (Assistant Director, Head)

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  1. Mira Sil
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  2. Diptendu Chatterjee
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  3. Pranab Kumar Sarkar
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Sil, M., Chatterjee, D. & Sarkar, P.K. Comparative analysis of the membrane proteins and their specificities in neurons, protoplasmic astrocytes, and oligodendrocytes from rat brain. Neurochem Res 11, 1181–1191 (1986). https://doi.org/10.1007/BF00965946

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  • DOI: https://doi.org/10.1007/BF00965946

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