The invention relates generally to methods and compositions concerning
desaturase enzymes that modulate the number and location of double bonds
in long chain poly-unsaturated fatty acids (LC-PUFA's). In particular,
the invention relates to methods and compositions for improving omega-3
fatty acid profiles in plant products and parts using desaturase enzymes
and nucleic acids encoding for such enzymes. In particular embodiments,
the desaturase enzymes are Tetraselmis suecica delta 6 desaturases. Also
provided are improved soybean oil compositions having GLA and SDA.