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Title of Journal: Appl Biochem Biotechnol

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Abbravation: Applied Biochemistry and Biotechnology

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Springer-Verlag

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DOI

10.1007/978-1-4020-4410-6/1

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1559-0291

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Kinetic Studies on the Product Inhibition of Enzym

Authors: Yelian Miao Jie Yu Chen Xuejian Jiang Zhou Huang
Publish Date: 2012/05/03
Volume: 167, Issue: 2, Pages: 358-366
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Abstract

In order to understand the product inhibition of enzymatic lignocellulose hydrolysis the enzymatic hydrolysis of pretreated rice straw was carried out over an enzyme loading range of 2 to 30 FPU/g substrate and the inhibition of enzymatic hydrolysis was analyzed kinetically based on the reducing sugars produced It was shown that glucose xylose and arabinose were the main reducing sugar components contained in the hydrolysate The mass ratio of glucose xylose and arabinose to the total reducing sugars was almost constant at 520  297  and 188  respectively in the enzyme loading range The reducing sugars exerted competitive inhibitory interferences to the enzymatic hydrolysis Glucose xylose and arabinose had a dissociation constant of 124 054 and 033 g/l respectively The inhibitory interferences by reducing sugars were superimposed on the enzymatic hydrolysis The enzymatic hydrolysis could be improved by the removal of the produced reducing sugars from hydrolysateThis research project was financially supported by the grants of the National Natural Science Foundation of China and the People’s Government of Guangdong Province U0733001 and the National Basic Research Program of China 973 Program 2009CB724700

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