Patent ID: 7638598

Claim:
An isolated peptide having the formula: R 1 -R 2 -R 3 -R 4 -R 5 -R 6 -R 7 wherein: R 1 is 1-6 amino acid residues, at least one of which is tyrosine or phenylalanine; R 2 is cysteine or penicillamine; R 3 is a bond; R 4 is 7-8 amino acids; R 5 is a bond; R 6 is cysteine or penicillamine; R 7 is 1-5 amino acid residues, at least one of which is tyrosine or phenylalanine; wherein: R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 , taken together, are 30 amino acids or less; R 1 is selected from the group consisting of F; S-Y; G-S-Y; Y; G-G-S-Y (SEQ ID NO:21); and G-G-G-S-Y (SEQ ID NO:22); R 2 and R 6 are connected by a bond to cyclicize said peptide; R 4 is selected from the group consisting of F-P-D-E-E-G-A (SEQ ID NO: 1); and F-Y-P-D-E-E-G-A (SEQ ID NO:2); and R 7 is selected from the group consisting of F; Y-G-G-S (SEQ ID NO:27); Y-G-G-G (SEQ ID NO:23); Y-G-G-G-S (SEQ ID NO:24); Y; Y-G, and Y-G-G.