Patent ID: 8435778

Claim:
An isolated polynucleotide selected from the group consisting of (a) to (d) below: (a) an isolated polynucleotide comprising the nucleotide sequence of SEQ ID NO: 1; (b) an isolated polynucleotide encoding a methyltransferase consisting of the amino acid sequence of SEQ ID NO: 2; (c) an isolated polynucleotide encoding a methyltransferase consisting of an amino acid sequence wherein 1 to 50 amino acids are deleted, substituted, inserted and/or added in the amino acid sequence of SEQ ID NO: 2, and having as lignan methylation activity; and, (d) an isolated polynucleotide encoding a methyltransferase having an amino acid sequence having at least 85% identity to the amino acid sequence of SEQ ID NO: 2, and having a lignan methylation activity.