Patents by Inventor Shukun Yu

Shukun Yu 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).

  • .alpha.-1,4-glucan lyase from a fungus, its purification gene cloning and expression in microorganisms
    Patent number: 5908760
    Abstract: A method of preparing .varies.-glucan lyase enzymes is described. The method comprises isolating the enzymes from a culture of fungus wherein the culture is substantially free of any other organisms. Also described are the amino acid sequences for the enzymes and their coding sequences.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: June 1, 1999
    Assignee: Danisco A/S
    Inventors: Kirsten Bojsen, Shukun Yu, Karsten Kragh, Tove Christensen, Jan Marcussen
  • Glucan lyase producing 1,5-anhydrofructose
    Patent number: 5695970
    Abstract: The invention relates to an enzyme, exo-.alpha.-1,4-glucan lyase, capable of successively cleaving the terminal .alpha.-1,4-D-glucosidic bonds from the non-reducing ends of an .alpha.-1,4-glucan. The enzyme is selected from the group consisting of .alpha.-1,4-glucan lyase isolated from an alga and functional derivatives and analogs derived from a nucleotide sequence related to an alga .alpha.-1,4-glucan lyase. Further, a method of enzymatically cleaving the terminal .alpha.-1,4-D-glucosidic bonds from the non-reducing ends of an .alpha.-1,4-glucan, and the degradation product 1,5-anhydrofructose for use as an oxygen radical scavenger or anti-oxidant and/or as a sugar substitute, are disclosed. Additionally, a method of producing an enzyme capable of successively cleaving the terminal .alpha.-1,4-glucosidic bonds from the non-reducing ends of an .alpha.
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: December 9, 1997
    Assignee: T&M Biopolymer Aktiebolag
    Inventors: Shukun Yu, Marianne Pedersen, Lennart Kenne