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![2B-(A) [Biotin-Arg-Arg-Ala-Ala-Glu-Glu-Leu-Asp-Ser-Arg-Ala-Gly-Ala-Pro-Gln-Leu-OH; MW: 1983.23] - 1 mg](/web/image/product.product/122855/image_1024/%5BSP-55157-1%5D%202B-(A)%20%5BBiotin-Arg-Arg-Ala-Ala-Glu-Glu-Leu-Asp-Ser-Arg-Ala-Gly-Ala-Pro-Gln-Leu-OH;%20MW:%201983.23%5D%20-%201%20mg?unique=53c20ec)