... S. M’Barek et al. (Eur. J. Biochem. 270) Ó FEBS 2003 Synthesis and characterization of Pi4, a scorpion toxin from Pandinus imperator that acts on K+ channels Sarrah M’Barek1, Amor Mosbah1, ... Fajloun,Z.,Kharrat,R.,Chen,C.,Lecomte,C.,diLuccio,E.,Bichet,D.,ElAyeb,M.,Rochat,H.,Allen,P.D.,Pessah,I.N.,DeWaard, M. & Sabatier, J.M. (2000) Chemical synthesis and char-acterization of maurocalcine, a scorpion toxin that activates Ca2+release channel/ryanodine ... Functional map of Pi4 towards rat Kv1.2 channel, and comparison with that of Pi1. Functional maps of Pi4 [1] and Pi1 [5–7] (A and B,respectively). The structures of scorpion toxins are shown according...