Fig. 5

Ts19 Frag-I alignment. The multiple sequence alignment of Ts19 Frag-I with other β-KTx class (subfamily) 2 scorpion toxins: the amino acid sequences are highlighted according to the residues responsible for signal peptide (gray), propeptide (yellow) and cytolytic effect (blue). The amino acid in pink is considered the N-terminal residue of the toxin by Alvarenga et al. [34]. The alignments and identity – Id (%) were performed using ClustalW2. Cysteines are highlighted in black