Patent ID: 8822662

Claim:
A polynucleotide comprising a nucleic acid sequence operably linked to a heterologous expression control sequence, wherein said nucleic acid sequence is selected from the group consisting of: (a) the nucleic acid sequence of SEQ ID NO: 1 or 2; (b) a nucleic acid sequence which encodes a polypeptide comprising the amino acid sequence of SEQ ID NO: 3; and (c) a nucleic acid sequence which encodes a polypeptide having Δ15-desaturase activity and comprising an amino acid sequence having at least 70% sequence identity to the amino acid sequence of SEQ ID NO: 3, wherein said polypeptide comprises the desaturase motif 2 of SEQ ID NO: 47, and wherein position 16 of SEQ ID NO: 47 is histidine.