Synonyms: BSA; Bovine albumin
CAS No.: 9048-46-8
Purity: ≥96% (agarose gel electrophoresis)
Storage Temperature: 2-8°C
Biochem/physiol Actions: Certain conformational and primary-sequence epitopes of BSA are suspected allergens in human beef and milk allergies.1
Preparation Note: Serum albumin may be referred to as Cohn Fraction V. This naming convention is taken from the original Cohn 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.
Caution: May yield an insulin blank of up to 0.1 μunit per mg in certain procedures.
Assay: ≥96% (agarose gel electrophoresis)
Form: lyophilized powder
Grade: RIA grade
Mol Wt: mol wt ~66 kDa
pH: 5.0-5.6 (1% in H2O)
Storage Temp.: 2-8°C
Suitability: suitable for insulin RIA procedures