A new neurotoxin receptor site on Na+ channels identified by a conotoxin that affects Na+ channel inactivation in molluscs, and acts as an antagonist in rat brain: M. Fainzilber,1O. Kofman,2E. Zlotkin1 and D. Gordon1 (1Department of Cell & Animal Biology, Silberman Life Sciences Institute, Hebrew University, 91904 Jerusalem, Israel; and 2Department of Behavioral Sciences & Beer-Sheva Mental Health Center, Ben-Gurion University, Beer-Sheva, Israel)