Institution: | (1) Department of Genetics, Biological Research Center, Hungarian Academy of Sciences, P.O. Box 521, H-6701 Szeged, Hungary;(2) Abt. Schell, Max-Planck Institut für Zuchtungsforschung, D-5000 Köln 30, F.R.G.;(3) Present address: Microbiology Department, Faculty of Pharmacy, University of Seville, Seville, Spain |