Figure 1.
α-CTx LvIF pre-propeptide and encoded toxin. A putative proteolytic processing site 1 (R) and amidation processing site 2 (C) are indicated by the arrows, and the Pro-region is in italics. The first glycine following the C-terminal cysteine in the mature toxin is presumed to be processed to a C-terminal amide in α-CTx LvIF. The deduced mature toxin sequence of LvIF (the underlined region) is GCCSHPACAGNNQDIC# (#, C-terminal carboxamide).