Institution: | (1) Department of Molecular Biology, Stockholm University, S-106 91 Stockholm, Sweden;(2) Present address: Department of Biochemistry, Adelaide University, G.P.O. Box 498, 5001 Adelaide, South Australia, Australia;(3) Present address: Department of Biology, University of Houston, 77204-5513 Houston, Texas, USA;(4) Present address: Department of Biochemistry, School of Medicine, Stanford University Medical Center, 94305-5307 Stanford, California, USA |