Funnel-web spider toxins produce repetitive firing in excitable cells: G. M. Nicholson1, I. Spence2, M. Tyler3, A. Comis4 and M. E. H. Howden4 (1Department of Biochemistry and Physiology, School of Biological & Biomedical Sciences, University of Technology, Sydney, N.S.W. 2007, 2Department of Pharmacology, University of Sydney, N.S.W. 2006, 3CSIRO Division of Food Processing, North Ryde, N.S.W. 2113, and 4Division of Biological & Health Sciences, Deakin University, Geelong, Victoria 3217, Australia)