1. Department of Vegetable Crops, University of California, Davis, California 95616 (S.A.);
2. Institute of Plant Biochemistry, D–06120 Halle, Germany (T.N.);
3. Department of Biochemistry and Biotechnology, Martin-Luther-University Halle-Wittenberg, D–06120 Halle, Germany (V.A., G.-J.K.);
4. Probiodrug Gesellschaft für Arzneimittelforschung mbH, D–06120 Halle, Germany (K.G.).