摘要:
Embodiments of the present disclosure relate to a process for producing isoprenoid precursor molecules and/or isoprenoids from a starch substrate by saccharification and/or fermentation. The saccharification is effectively catalyzed by a glucoamylase at a pH in the range of 5.0 to 8.0. At a pH of 6.0 or above, the glucoamylase possesses at least 50% activity relative to its maximum activity. The saccharification and fermentation may be performed as a simultaneous saccharification and fermentation (SSF) process.
摘要:
Embodiments of the present disclosure relate to a process for producing isoprenoid precursor molecules and/or isoprenoids from a starch substrate by saccharification and/or fermentation. The saccharification is effectively catalyzed by a glucoamylase at a pH in the range of 5.0 to 8.0. At a pH of 6.0 or above, the glucoamylase possesses at least 50% activity relative to its maximum activity. The saccharification and fermentation may be performed as a simultaneous saccharification and fermentation (SSF) process.
摘要:
Embodiments of the present disclosure relate to a process for producing isoprene from a starch substrate by saccharification and/or fermentation. The saccharification is effectively catalyzed by a glucoamylase at a pH in the range of 5.0 to 8.0. At a pH of 6.0 or above, the glucoamylase possesses at least 50% activity relative to its maximum activity. The saccharification and fermentation may be performed as a simultaneous saccharification and fermentation (SSF) process.
摘要:
Embodiments of the present disclosure relate to a process for producing downstream products, such as fermentable sugars and end products, from a starch substrate by saccharification and/or fermentation. The saccharification is effectively catalyzed by a glucoamylase at a pH in the range of 5.0 to 8.0. At a pH of 6.0 or above, the glucoamylase possesses at least 50% activity relative to its maximum activity. The saccharification and fermentation may be performed as a simultaneous saccharification and fermentation (SSF) process.
摘要:
The present disclosure relates to a Bacillus subtilis alpha-amylase (AmyE) or its variants thereof. AmyE or its variants thereof may be used to more efficiently produce fermentable sugars from starch. Also disclosed are a composition comprising a glucoamylase and AmyE or variant thereof and a method of processing starch utilizing the described enzyme composition.
摘要:
The present invention relates to an alpha-amylase blend, including a B. stearothermophilus alpha-amylase (AmyS) wherein the amino acid at position S242 is substituted and a B. licheniformis alpha-amylase The invention also relates to processes using the alpha-amylase blends for starch liquefaction and saccharification, ethanol production, and a sweetener production.
摘要:
The present invention relates to a process for producing downstream products, such as fermentable sugars (e.g., glucose) and alcohols (e.g., ethanol) from starch-containing material (e.g., grain) without a pH adjustment before or after the starch liquefaction step.
摘要:
The present invention relates to an alpha-amylase blend, including a B. stearothermophilus alpha-amylase (AmyS) wherein the amino acid at position S242 is substituted and a B. licheniformis alpha-amylase blends for starch liquefaction and saccharification, ethanol production, and a sweetener production.
摘要:
Disclosed are compositions comprising variants of alpha-amylase that have alpha-amylase activity and which exhibit altered properties relative to a parent AmyS-like alpha-amylase from which they are derived. The compositions comprise an additional enzyme such as a phytase. Also disclosed are methods of using the compositions, and kits related thereto.
摘要:
The present disclosure relates to an enzyme blend comprising a low pH, thermostable alpha-amylase and a Bacillus licheniformis alpha-amylase. The blend can include at least about 1.0 Liquefon Unit (LU) of the B. licheniformis alpha-amylase for every 5.0 Modified Wohlgemuth Unit (MWU) of the low pH, thermostable alpha-amylase. The enzyme blend described is suitable for starch liquefaction and saccharification, ethanol production, and/or sweetener production, among other things. Also provided herein is a method of processing a starch by liquefying the starch with the low pH, thermostable alpha-amylase and the Bacillus licheniformis alpha-amylase, simultaneously or sequentially.