Institution: | (1) Department of Biochemistry, Rothamsted Experimental Station, Harpenden, Herts., U.K.;(2) Department of Plant Molecular Biology, University of Leiden, Wassenaarseweg 64, 2333 AL Leiden, The Netherlands;(3) Present address: Department of Plant Physiol. Research, Agricultural University, Generaal Foulkesweg 72, 6703 BW Wageningen, The Netherlands |