Institution: | (1) Howard Hughes Medical Institute, Department of Chemistry and Biochemistry, University of Colorado, Boulder, 80309-0215 Boulder, CO, USA;(2) Division of Plant Industry, CSIRO, 2601 Canberra, Australia;(3) Max-Planck-Institut für Biochemie, Genzentrum der Universität München, D-8033 Martinsried, Federal Republic of Germany;(4) GBF — Gesellschaft für Biotechnologische Forschung, Mascheroder Weg 1, D-3300 Braunschweig, Federal Republic of Germany |