Patents by Inventor Hsueh-Ling Cheng

Hsueh-Ling Cheng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Isolated xylanase gene with mutations and site-specific mutagenesis method thereof
    Patent number: 7749743
    Abstract: An isolated xylanase gene with mutations includes a fifty-eighth amino acid or a thirty-eighth amino acid generated from transforming asparagine to aspartic acid so as to form the isolated xylanase gene. A site-specific mutagenesis method includes: mutating the forty-first amino acid or the thirty-eighth amino acid of the xylanase gene by transforming asparagine to aspartic acid so as to form the isolated xylanase gene.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: July 6, 2010
    Assignee: Natiional Pingtung University of Science & Technology
    Inventors: Yo-Chia Chen, Hsueh-Ling Cheng, Yu-Chuan Chiang
  • Xylanase gene sequences from the genomic DNA of unpurified rumen microorganisms
    Patent number: 7635471
    Abstract: A xylanase gene, denoted xynR8, encoding a xylanase (XynR8) obtained from the unisolated rumen microorganisms is provided. The DNA sequence of the xynR8 gene, xylanase, is also provided, the enzyme is thermostable, and highly specific for xylans with high activity. Transformation of microbial hosts with the xynR8 gene is described. A method for degrading the xylan-containing structure comprises hydrolyzing the ?-1,4-glycosidic bonds of xylans by contacting xylanase is provided, and a composition employing the above-mentioned hydrolyzing method is further addressed.
    Type: Grant
    Filed: August 21, 2006
    Date of Patent: December 22, 2009
    Assignee: Genozyme Biotech Inc.
    Inventors: Kou-Joan Cheng, Yo-Chia Chen, Hsueh-Ling Cheng, Shiou Hua Lin, Je Ruei Liu, Bi Yu
  • Isolated xylanase gene with mutations and site-specific mutagenesis method thereof
    Patent number: 7615362
    Abstract: A mutated xylanase gene with a broad pH range of reaction includes a forty-first amino acid or a twenty-first amino acid generated from transforming asparagine to aspartic acid so as to form the mutated xylanase gene. A site-specific mutagenesis method includes the step of: mutating the forty-first amino acid or the twenty-first amino acid of the xylanase gene by transforming asparagine to aspartic acid so as to form the mutated xylanase gene.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: November 10, 2009
    Assignee: National Pingtung University of Science & Technology
    Inventors: Hsueh-Ling Cheng, Yo-Chia Chen, Yu-Chuan Chiang
  • Mutated Xylanase Gene with High Reaction Activity and Site-Specific Mutagenesis Method Thereof
    Publication number: 20080254539
    Abstract: A mutated xylanase gene with high reaction activity includes a fifty-eighth amino acid or a thirty-eighth amino acid generated from transforming asparagine to aspartic acid so as to form the mutated xylanase gene. A site-specific mutagenesis method includes the step of: mutating the forty-first amino acid or the thirty-eighth amino acid of the xylanase gene by transforming asparagine to aspartic acid so as to form the mutated xylanase gene.
    Type: Application
    Filed: September 7, 2007
    Publication date: October 16, 2008
    Inventors: Yo-Chia Chen, Hsueh-Ling Cheng, Yu-Chuan Chiang
  • Mutated Xylanase Gene with a Broad PH Range of Reaction and Site-Specific Mutagenesis Method Thereof
    Publication number: 20080254526
    Abstract: A mutated xylanase gene with a broad pH range of reaction includes a forty-first amino acid or a twenty-first amino acid generated from transforming asparagine to aspartic acid so as to form the mutated xylanase gene. A site-specific mutagenesis method includes the step of: mutating the forty-first amino acid or the twenty-first amino acid of the xylanase gene by transforming asparagine to aspartic acid so as to form the mutated xylanase gene.
    Type: Application
    Filed: September 7, 2007
    Publication date: October 16, 2008
    Inventors: Hsueh-Ling Cheng, Yo-Chia Chen, Yu-Chuan Chiang