Patent ID: 7368432

Claim:
An isolated conotoxin peptide having the amino acid sequence Ala-Cys-Cys-Gly-Xaa 1 -Xaa 2 -Leu-Cys-Ser-Xaa 3 -Cys (SEQ ID NO :5); wherein Xaa 1 is Tyr, mono-halo-Tyr, di-halo-Tyr, O-sulpho-Tyr, 0-phospho-Tyr, nitro-Tyr; Xaa 2 is Lys, N-methy-Lys, N,N-dimethyl-Lys or N,N,N-trimethyl-Lys; Xaa 3 is Pro or hydroxy-Pro; and the C-terminus contains a carboxyl or amide group.