PROTEIN HAVING SWEETNESS
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United States of America Patent
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Issued Date -
Feb 18, 2010
app pub date -
Jan 28, 2008
filing date -
Mar 23, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An object of the present invention is to discover a substance with sweetness independent of pH and to provide a novel composition with sweetness characterized by containing the substance. Provided are: an NAS variant characterized by having sweetness independent of pH in the case of combination with a polypeptide NBS variant by causing substitution mutation or deletion mutation in one or several amino acids out of the amino acid residues constituting a polypeptide NAS; an NBS variant characterized by having sweetness independent of pH in the case of combination with a polypeptide NAS variant by causing substitution mutation or deletion mutation in one or several amino acids out of the amino acid residues constituting a polypeptide NBS; a diner comprising a combination of the NAS variant and the NBS variant; a recombinant vector containing a gene encoding the NAS variant and a gene encoding the NBS variant; and a transformant containing the vector.
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