Journal of Lipid Research, Vol 20, 825-833, Copyright © 1979 by Lipid Research, Inc.

ARTICLES

Aminopropyl silica gel as a solid support for preparation of glycolipid immunoadsorbent and purification of antibodies

SK Kundu and SK Roy

Aminopropyl silica gel was prepared from porous silica gel and was used as a solid support for immunoadsorbent in the purification of anti- glycolipid antibodies. For neutral glycosphingolipids, a carboxyl function was generated by oxidation of the olefinic double bond of the sphingosine moiety, whereas for gangliosides the carboxyl group of sialic acid was used to couple with aminopropyl silica gel in the presence of a carbodiimide. These compounds were used for purifying anti-glycolipid antibodies from serum of immunized rabbits. The antibodies bound to the su-strate were released by 2 M potassium thiocyanate and their immunological properties were studied. Aminopropyl silica gel may be preferred over conventional organic solid supports for the following reasons: 1) faster flow rate; 2) higher capacity; 3) easier handling; 4) more economical; and 5) lower susceptibility to microbial attack.
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