Molecular cloning and nucleotide sequence analysis of the cDNAs encoding the main α and β-neurotoxins from the venom of the South American scorpion Tityus serrulatus: B. Céard,1M.-F. Martin-Eauclaire,1A.-M. Ribeiro,2C. Diniz,3H. Rochat1 and P. E. Bougis1 (1U.R.A. 1455 du Centre National de la Recherche Scientifique, Laboratorie de Biochimie, Faculté de Médecine Secteur Nord, Bd. P. Dramard, 13326 Marseille Cédex 15, France; 2Departamento de Bioquimica e Immunologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Campus Pampulha, 30000, Belo Horizonte, M.G., Brazil; and 3Fundaçâo Ezequiel Dias, Rua Conde Pereira Carneiro, 80, 30550, Belo-Horizonte, M.G., Brazil)