H-Cys-Lys-Gly-Lys-Gly-Ala-Lys-Cys-Ser-Arg-Leu-Met-Tyr-Asp-Cys-Cys-Thr-Gly-Ser-Cys-Arg-Ser-Gly-Lys-Cys-NH2 (Disulfide bonds between Cys¹ and Cys¹⁶/Cys⁸ and Cys²⁰/Cys¹⁵ and Cys²⁵)