Two enzymes, -amylase and glucoamylase have been individually and co-conjugated to pectin by covalent binding. Both the enzyme systems showed better thermal and pH stability over the free enzyme
system with the complete retention of original activities. Mixture of individually conjugated enzymes
showed lower inactivation rate constant with longer half life than the co-conjugated enzyme system.
Individually conjugated enzymes showed an increase of 56.48 kJ/mole and 38.22 kJ/mole in activation
energy for denaturation than the free enzymes and co-conjugated enzymes, respectively. Kmas well as
Vmaxof individually and co-conjugated enzymes was found to be higher than the free enzymes. SDSpolyacrylamide gel electrophoresis confirmed the formation of conjugate and co-conjugate as evident by
increased molecular weight. Both the enzyme systems were used for starch hydrolysis where individually conjugated enzymes showed highest release of glucose at 60
◦
C and pH 5.0 as compared to free and
co-conjugated enzyme