2.12 Enzymatic hydrolysis The resistance to a-amylase digestion of the exopolymers derived from fungi was determined using a-amylase (EC. 3.2.1.1) from porcine pancrease (Sigma- Aldrich). Briefly, 2 unit/mL of enzyme was prepared in 20 mM sodium phosphate buffer with 6.7 mM sodium chloride while the polymer solutions (1 %w/v) were prepared in sodium phosphate buffer pH 7. Then, 1 ml of enzyme solution is added into each sample solution (1 mL) with colour reagent (dinitrosalicylic acid, DNS, 1 mL). The reaction mixture was incubated at 37 oC for 0 and 6 h after that the reaction was stopped by placing in boiling water for exactly 15 min. Then, the mixture was cooled to room temperature before adding with deionized water (9 mL). The reducing sugar was measured by using a Microplate Reader at 540 nm. Finally, the obtained values were calculated from glucose standard curve and converted to % hydrolysis.