... S5–H5–S6domains. The quality of all molecular models was assessedusing the programsWHAT IF[28] and PROCHECK[29]. In eachcase, the stereochemical quality and the Ramachandran [30]scores were good and ... S. M’Barek et al. (Eur. J. Biochem. 270) Ó FEBS 2003Synthesis and characterization of Pi4, a scorpion toxinfromPandinus imperator that acts on K+channelsSarrah M’Barek1, Amor Mosbah1, ... Kluwer Academic Publishers, Dordrecht, theNetherlands.51. Srinivasan, K.N., Sivaraja, V., Huys, I., Sasaki, T., Cheng, B.,Kumar, T.K., Sato, K. & Tytgat, J., YuC., San, B.C., Rangana-than,...