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A2153 Sigma

Bovine Serum Albumin

lyophilized powder, ≥96% (agarose gel electrophoresis)

Synonym: Albumin bovine serum, BSA, Bovine albumin

Properties

Related Categories Albumin, Albumins, Biochemicals and Reagents, Bovine Serum Albumins, Core Bioreagents,
assay   ≥96% (agarose gel electrophoresis)
form   lyophilized powder
mol wt   mol wt ~66 kDa
pH   6.5-7.5 (1% in 0.15 M sodium chloride)
storage temp.   2-8°C

Description

Frequently Asked Questions

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Preparation Note

Often referred to as Cohn fraction V; this product is prepared by a modified method of the Cohn cold ethanol fractionation method.

Serum albumin may be referred to as 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 "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.

Biochem/physiol Actions

Certain conformational and primary-sequence epitopes of BSA are suspected allergens in human beef and milk allergies.1

Price and Availability

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