Patent ID: 7595298

Claim:
A polypeptide or salt thereof represented by one of the following formulas: Ala-Arg-Nal-Cys-Tyr-Arg-Lys-DLys-Pro-Tyr-Arg-Cit-Cys-Arg (SEQ ID NO: 3); Arg-Arg-Nal-Cys-Tyr-Ala-Lys-DLys-Pro-Tyr-Arg-Cit-Cys-Arg (SEQ ID NO: 4); Arg-Arg-Nal-Cys-Tyr-Arg-Ala-DLys-Pro-Tyr-Arg-Cit-Cys-Arg (SEQ ID NO: 5); Arg-Arg-Nal-Cys-Tyr-Arg-Lys-DAla-Pro-Tyr-Arg-Cit-Cys-Arg (SEQ ID NO: 6); Arg-Arg-Nal-Cys-Tyr-Arg-Lys-DLys-Ala-Tyr-Arg-Cit-Cys-Arg (SEQ ID NO: 7); Arg-Arg-Nal-Cys-Tyr-Arg-Lys-DLys-Pro-Ala-Arg-Cit-Cys-Arg (SEQ ID NO: 8); Arg-Arg-Nal-Cys-Tyr-Arg-Lys-DLys-Pro-Tyr-Ala-Cit-Cys-Arg (SEQ ID NO: 9); Cit-Arg-Nal-Cys-Tyr-Arg-Lys-DLys-Pro-Tyr-Arg-Cit-Cys-Arg (SEQ ID NO: 10); Arg-Arg-Nal-Cys-Tyr-Arg-Cit-DLys-Pro-Tyr-Arg-Cit-Cys-Arg (SEQ ID NO: 12); Arg-Arg-Nal-Cys-Tyr-Arg-Lys-DLys-Pro-Tyr-Cit-Cit-Cys-Arg (SEQ ID NO: 14); Cit-Arg-Nal-Cys-Tyr-Arg-Lys-DCit-Pro-Tyr-Arg-Cit-Cys-A7, wherein A7 represents an arginine residue in which a carboxyl group is amidated (SEQ ID NO: 16); or Arg-Arg-Nal-Cys-Tyr-Arg-Lys-DCit-Pro-Tyr-Arg-Cit-Cys-Arg (SEQ ID NO: 21).