A3858
Bovine Serum Albumin
lyophilized powder, Protease, essentially free, ≥98% (agarose gel electrophoresis)
Synonym(s):
Albumin bovine serum, BSA, Bovine albumin
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About This Item
Biological source:
bovine
Assay:
≥98% (agarose gel electrophoresis)
Form:
lyophilized powder
Technique(s):
western blot: suitable
Impurities:
≤5.0% Loss on drying
Concentration:
<0.005 unit/mg solid (Protease)
biological source
bovine
assay
≥98% (agarose gel electrophoresis)
form
lyophilized powder
Quality Level
Gene Information
bovine ... ALB(280717)
purified by
heat shock fractionation
packaging
poly bottle of
origin
New Zealand origin
concentration
<0.005 unit/mg solid (Protease)
technique(s)
western blot: suitable
impurities
≤5.0% Loss on drying
loss
≤5%
pH
7
solubility
water: soluble (40 mg/ml)
UniProt accession no.
foreign activity
Protease, essentially free
storage temp.
2-8°C
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Application
Serum albumin is used in different molecular biology applications, e.g. as an inert protein stabilizer for stock solutions of enzymes and of proteins of interest. In such applications, it is therefore important for the BSA to be protease free, to maintain the integrity of the protein or the enzyme of interest.
Biochem/physiol Actions
Certain conformational and primary-sequence epitopes of BSA are suspected allergens in human beef and milk allergies.
Preparation Note
Derived from New Zealand source serum
Prepared using heat shock fractionation
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.
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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