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Reactivity of glycoconjugate in membrane system ii can a neutral glycolipid function as lectin receptor in the presence of gangliosides in plasma membrane

, : Reactivity of glycoconjugate in membrane system ii can a neutral glycolipid function as lectin receptor in the presence of gangliosides in plasma membrane. Journal of Biosciences (Bangalore) 11(1-4): 495-502

To examine how surface potential controls the reactivity of glycoconjugates at cell surface, the interaction of galactose-specific lectins e.g. peanut agglutinin, Ricinus cummunis agglutinin with liposomes bearing asialo GM1 were studied in the presence of varying amount of ganglioside mixture, GMn. The presence of 5% GMn causes complete slowing down of precipitin reaction and thereby make carbohydrate moiety of asialo GM1 completely inaccessible i.e. 'cryptic'. In contrast the presence of 1-2% GMn enhances the apparent rate and amplitude of the precipitin reaction as surface potential becomes more negative. The relevance of the findings has been discussed in relation to the expression and involvement of the cell-surface sialic acid residues during development and differentiation.


DOI: 10.1007/bf02704698

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