In Vitro Evaluating the Activities and Stabilities of the Multihydratases Produced by Aspergillus Niger Zju-Y1 in Simulated Poultry Digestive Tract ph Levels

Aspergillus niger as a cell factory could produce multi-hydratases, and pH level has a significant effect on enzymatic activity. In this study, the activities and stabilities of the multi-hydratases produced by Aspergillus niger zju-Y1 were evaluated under the various pH levels of digestive process in poultry, respectively. The results show that the high activities and stabilities of the multi-hydratases under the simulated pH levels of poultry digestive process endue it the satisfactory characteristics as feedstuff additives of high quality, and the strain Aspergillus niger zju-Y1 could be used as a good producer of enzymes applied in feedstuff.