If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
This product is soluble in water. This product contains sodium citrate buffer salts, so addition of a buffer is probably not necessary; just adding water is sufficient.
Sigma Aldrich has not tested the stability of this product in solution. It is recommended to prepare fresh solutions.
There is no linker or "spacer". The link between the BSA and the biotin is an amide bond connecting an amino group on the BSA to the carboxy group on the biotin.
The method of preparation of this product is considered proprietary by Sigma-Aldrich.
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Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
Bovine Serum Albumin is produced as a protein of 607 amino acids. The signal peptide (amino acids 1-18) and the propeptide (amino acids 19-22) are cleaved to make the mature form. The mature form of BSA is 583 amino acids (amino acids 25-607, Uniprot P02769). The sequence for the mature protein is below:DTHKSEIAHRFKDLGEEHFKGLVLIAFSQYLQQCPFDEHVKLVNELTEFAKTCVADESHAGCEKSLHTLFGDELCKVASLRETYGDMADCCEKQEPERNECFLSHKDDSPDLPKLKPDPNTLCDEFKADEKKFWGKYLYEIARRHPYFYAPELLYYANKYNGVFQECCQAEDKGACLLPKIETMREKVLTSSARQRLRCASIQKFGERALKAWSVARLSQKFPKAEFVEVTKLVTDLTKVHKECCHGDLLECADDRADLAKYICDNQDTISSKLKECCDKPLLEKSHCIAEVEKDAIPENLPPLTADFAEDKDVCKNYQEAKDAFLGSFLYEYSRRHPEYAVSVLLRLAKEYEATLEECCAKDDPHACYSTVFDKLKHLVDEPQNLIKQNCDQFEKLGEYGFQNALIVRYTRKVPQVSTPTLVEVSRSLGKVGTRCCTKPESERMPCTEDYLSLILNRLCVLHEKTPVSEKVTKCCTESLVNRRPCFSALTPDETYVPKAFDEKLFTFHADICTLPDTEKQIKKQTALVELLKHKPKATEEQLKTVMENFVAFVDKCCAADDKEACFAVEGPKLVVSTQTALA
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