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    • 3. 发明申请
    • ENZYMATIC HYDROLYSIS OF CELLULOSIC BIOMASS THROUGH ENHANCED REMOVAL OF OLIGOMERS
    • 纤维素生物质通过增强去除低聚物酶水解
    • WO2010011957A3
    • 2010-04-01
    • PCT/US2009051737
    • 2009-07-24
    • UNIV CALIFORNIAWYMAN CHARLES EKUMAR RAJEEV
    • WYMAN CHARLES EKUMAR RAJEEV
    • C12P21/06C12P1/00C12P7/10
    • C12P7/10C12P19/14Y02E50/16
    • The methods and composition of the disclosure are directed to the reducing cellulase inhibition by xylooligomers through adding hemicellulase enzymes that break xylooligomers down to monomeric sugars with a corresponding increase in glucose release. What was heretofore unknown is that xylobiose and higher xylooligomers inhibit enzymatic hydrolysis of any lignocellulosic biomass (plant material) used as feed stocks for commercial ethanol production, including, but not limited to, corn stover, birch wood, switchgrass, poplar wood, Miscanthus, aspen, other grasses and woody plants, and many other types of agricultural and forestry residues, as well as municipal solid waste. In addition, the examples herein show that xylobiose and xylotriose have progressively greater effects on hydrolysis rates. In accordance with the disclosure, the addition of one or more hemicellulase enzymes, such as xylanase and ß- xylosidase, to a lignocellulosic biomass significantly improves hydrolysis performance.
    • 本公开的方法和组合物涉及通过加入半纤维素酶来减少木聚糖寡聚体对纤维素酶的抑制作用,所述半纤维素酶将木聚糖寡聚体分解成单体糖,并相应增加葡萄糖释放。 迄今未知的是,木二糖和较高木寡糖抑制用作商业乙醇生产的原料的任何木质纤维素生物质(植物材料)的酶促水解,包括但不限于玉米秸秆,桦木,柳枝稷,白杨木,芒草, 白杨,其他草和木本植物,以及许多其他类型的农业和林业残余物,以及城市固体废物。 此外,本文的实施例显示木二糖和木三糖对水解速率的影响逐渐增大。 根据本公开内容,将一种或多种半纤维素酶例如木聚糖酶和β-木糖苷酶添加至木质纤维素生物质显着改善了水解性能。