Patent ID: 7947876

Claim:
A transgenic plant or a plant storage organ thereof in which GLP-1 derivatives are accumulated cleavable with a digestive enzyme and which is produced by a method comprising: integrating into a vector a linked DNA which comprises 3 or more tandem repeats of nucleic acids encoding the GLP-1 derivative in which the amino acid in the 8 th position of the GLP-1 derivative is selected from the group consisting of alanine, serine, and glycine, and in which the amino acid in the 26th position of the GLP-1 derivative is replaced with glutamine, the amino acid in the 34th position of the GLP-1 derivative is replaced with asparagine or aspartic acid, and C-terminal amino acid residue is Arg or Lys; introducing the vector into a plant cell; and redifferentiating a transgenic plant from said plant cell.