Synonym: BSA, Bovine albumin
CAS Number 9048-46-8
MDL number MFCD00130384
Popular Documents: Bulletin (PDF) | Specification Sheet (PDF)
| Related Categories | Albumin, Albumins by Application, Biochemicals and Reagents, Bovine Serum Albumins, Ethanol Fractionated, |
| mol wt | mol wt ~66 kDa |
| mol wt ~66,000 | |
| packaging | vial of 50 mg |
| impurities | ~0.3% dithiothreitol |
| storage temp. | −20°C |
Serum albumin may be referred to as Cohn Fraction V. This naming convention is taken from the original Cohn2 method of fractionating serum proteins using cold ethanol precipitation. Serum albumin was found in the fifth ethanol fraction using Cohn′s method. Since then, the term "Cohn Fraction V" has been used by some to describe serum albumin regardless of the method of preparation. Others have used this term to describe serum albumin purified by ethanol fractionation methods that have been highly modified since the original Cohn method was described. Sigma-Aldrich manufactures and distributes serum albumins purified from a variety of primary methods including the true Cohn fractionation method, modified ethanol fractionation methods, heat shock and chromatography. Additional purification steps may include crystallization or charcoal filtration.
Albumin from bovine serum can be used as a gel filtration molecular weight marker. It can be used in medical studies to quantify binding capacity and adsorption rate of protein enrichment and separation medium critical in proteomic research.
Certain conformational and primary-sequence epitopes of BSA are suspected allergens in human beef and milk allergies.1
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