Echistatin;Echistatin a1 (reduced), cyclic (2®Echistatin, α1 isoforM;11),(7®32),(8®37),(20®39)-tetrakis(disulfide)(9CI);Cys7 and Cys32;Cys8 and Cys37;ECHISTATIN,A1 ISOFORM;M.W. 5417.05 C217H341N71O74S9 (Disulfide bonds between Cys2 and Cys11/Cys7 and Cys32/ Cys8 and Cys37/Cys20 and Cys39);H-Glu-Cys-Glu-Ser-Gly-Pro-Cys-Cys-Arg-Asn-Cys-Lys-Phe-Leu-Lys-Glu-Gly-Thr-Ile-Cys-Lys-Arg-Ala-Arg-Gly-Asp-Asp-Met-Asp-Asp-Tyr-Cys-Asn-Gly-Lys-Thr-Cys-Asp-Cys-Pro-Arg-Asn-Pro-His-Lys-Gly-Pro-Ala-Thr-OH;Echistatin, ?1 isoform;CID 90488810;Echistatin, α1 isoform;Echistatin, α1 isoform