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![2B-(S) [Biotin-Arg-Arg-Ala-Ala-Gly-Gly-Leu-asp-Ser-Arg-Ala-Gly-Ser-Pro-Gln-Leu-OH; MW: 2000.24] - 1 mg](/web/image/product.product/122856/image_1024/%5BSP-55158-1%5D%202B-(S)%20%5BBiotin-Arg-Arg-Ala-Ala-Gly-Gly-Leu-asp-Ser-Arg-Ala-Gly-Ser-Pro-Gln-Leu-OH;%20MW:%202000.24%5D%20-%201%20mg?unique=53c20ec)