Affiliation: | (1) Present address: Laboratory of Peptide Biology, Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Science, 4-Kr Praha, Czochoslovakia;(2) Present address: Department of Experimental Medicine, F. Hoffmann-La Roche & Co. Ltd., CH-4002 Basel, Switzerland;(3) Present address: Institute of Molecular Biology and Biophysics, Swiss Federal Institute of Technology, CH-8049 Zürich, Switzerland |