Biotinyl-eAhx-Gly-Leu-Lys-Leu-Arg-Phe-Glu-Phe-Ser-Lys-Ile-Lys-Gly-Glu-Phe-Leu-Lys-Thr-Pro-Glu-Val-Arg-Phe-Arg-Asp-Ile-Lys-Leu-Lys-Asp-Asn-Arg-Ile-Ser-Val-Gln-Arg-OH Trifluoroacetate