Identification of peak components was achieved on a Hewlett- Packard 5890 GC system connected to a 5970A mass selective detector (Agilent Technologies). Split injection was applied, and the same type of column and temperature program as described above was used. Comparison to mass spectra of known FAMEs was used to identify each peak. In addition, double-bond locations for the unsaturated fatty acids were determined by interpreting spectra from picolinyl derivatives of free fatty acids (FFAs), employing the methodology described by Christie (24).