Patent ID: 8354498

Claim:
An isolated peptide, characterized in that it comprises the following sequence (I): TPA-Asn-Leu-His-Phe-Cys-Gln-Leu-Xaa a -Cys-Lys-Ser-Leu-Gly-Leu-Leu-Gly-Arg-Cys-Xaa b -Xaa c -Xaa d -Xaa e -Cys-Ala-Cys-Val-NH 2 (SEQ ID NO: 2), wherein TPA represents thiopropionic acid, Xaa a represents Arg or Lys, Xaa b represents Ala or Arg, Xaa c represents a D-amino acid, Xaa d represents Thr, Ser or Asn, and Xaa e represents phenylalanine or a phenylalanine derivative having the structure (II): where A is absent or represents S, O, NH or CH 2 , B is absent or represents a C 1 to C 6 branched or straight-chain alkyl, and R represents a C 3 to C 6 alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, cycloalkenyl, cycloheterocyloalkenyl, aryl, or heteroaryl.