... (lycotoxin [13], cupiennin 1 [14], oxyopinin [15]), ant (pilosulin [16], ponericins [17]) and scorpion. Similarpeptides are found in the skin secretion of frogs (magainin[18], dermaseptin [19]); ... peptides and bothfragments have the same total net charge, opistoporin 1contains three charged amino acids in this part of thesequence while pandinin 1 contains only one charged aminoacid in this ... double for pandinin 1 (pandinin 1 0.1071,opistoporin 1 0.055). The amino acid substitutions highlyresponsible for those differences are also situated mainly in the 21–27 fragment of amino acids....