Injection of the synthetic peptide causes a hyperexcitable phenotype in mice greater than three weeks of age at lower doses, and lethargy at higher doses. Expressed by the venom duct. The cysteine framework is XIX (C-C-C-CCC-C-C-C-C). Contains 5 disulfide bonds. Has no effect on glutamate (NMDA) receptors, Kv1.1/KCNA1, Kv1.2/KCNA2, Kv1.6/KCNA6, Nav1.2/SCN2A and Nav1.4/SCN4A channels, and acetylcholine receptors alpha-9/alpha-10.