1. Department of Biological Sciences, Center for Plant Lipid Research, University of North Texas, Denton, Texas 76203
2. Department of Chemistry, Iowa State University and Ames Laboratory–U.S. Department of Energy, Ames, Iowa 50011
3. Leibniz Institute of Plant Genetics and Crop Research, D-06466 Gatersleben, Germany
4. Thermo Fisher Scientific, 28199 Bremen, Germany