
Keywords: HelaTx1; Voltage-gated potassium channel; Scorpion toxin; Synthetic analog; Amino acid deletion; Amino acid insertionCD, circular dichroism; Fmoc, 9-fluorenylmethoxycarbonyl; HefuTx1, κ-hefutoxin 1; MALDI-TOF-MS, matrix assisted laser desorption/ionizatio