Preparation of Super Micro-molecular Dextran by Degradation of Small Molecule Dextran with Dextran Enzyme

The dextran enzyme was a special enzyme for degradation of dextran.It could degrade dextran-20(average Mw 16000~24000Da) to super micro-molecular dextran(average Mw 3000~6000Da).The results showed that when the substrate concentration was 30%(w/w),the reaction time was 10min and enzyme dosage was 69U/g,Dextran-20 was degraded to super micro-molecular dextran.The product had excellent performance,stable quality and narrow molecule weight distribution.