CYS 1 LEU 2 GLY 3 VAL 4 GLY 5 SER 6 CYS 7 VAL 8 ASP 9 PHE 10 ALA 11 GLY 12 CYS 13 GLY 14 TYR 15 ALA 16 VAL 17 VAL 18 CYS 19 PHE 20 D-TRP 21