Patent ID: 7402418

Claim:
An isolated or purified gene selected from the group consisting of: (A) a nucleotide sequence encoding the amino acid sequence shown in SEQ ID NO: 1 or 12; (B) a nucleotide sequence encoding an amino acid sequence comprising a deletion, addition or substitution of one to twenty amino acids in the amino acid sequence shown in SEQ NO: 1 or 12, wherein said amino acid sequence has the ability to catalyze the synthesis of fatty acids having trans-11-, cis-13-conjugated double bonds from a fatty acid having a double bond at position 12; (C) the nucleotide sequence shown in SEQ ID NO: 2 or 13; and (D) a nucleotide sequence comprising a deletion, addition or substitution of one to sixty nucleotides in the nucleotide sequence shown in SEQ ID NO: 2 or 13, wherein said nucleotide sequence encodes a protein having the ability to catalyze the synthesis of fatty acids having trans-11-, cis-13-conjugated double bonds from a fatty acid having a double bond at position 12.