氨基酸序列 Asp-Asn-Pro-Ser-Leu-Ser-I?le-Asp-Leu-Thr-Phe-His-Le?u-Leu-Arg-Thr-Leu-Leu-Glu?-Leu-Ala-Arg-Thr-Gln-Ser-?Gln-Arg-Glu-Arg-Ala-Glu-G?ln-Asn-Arg-Ile-Ile-Phe-As?p-Ser-Val-NH2