Abstract
The complex formation between Concanavalin A (Con A) and a polymer having pendant glucose groups was studied in order to design a glucose-sensitive polymer. The polymer having pendant glucose (poly(glucosyloxyethyl methacrylate) or (poly(GEMA)) forms a complex with Con A in tris HCl buffer (pH = 7.5). The solution then becomes turbid due to the multiple associations between poly(GEMA) and Con A. When free glucose or mannose are added to the turbid solution, the solution becomes transparent again. However, the addition of galactose does not cause the solution to be transparent. This indicates that Con A prefers to form a complex with free glucose or mannose (but not galactose) rather than with the pendant glucose in poly(GEMA). Therefore, the complex between poly(GEMA) and Con A is expected to be glucose- and mannose-sensitive. The apparent dissociation constants of the complexes between saccharide (poly(GEMA), glucose, and mannose) and Con A were also determined by affinity electrophoresis.
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