This product is not tested for the presence of biotin. However, Albumin products prepared by cold ethanol fractionation are expected to be biotin-free.
A4503
Bovine Serum Albumin
Bovine Serum Albumin
cold ethanol fraction, pH 5.2, ≥96%
Synonym(s):
Albumin bovine serum, BSA, Bovine albumin
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10 G
$237.00
50 G
$854.00
100 G
$1,330.00
500 G
$5,080.00
$237.00
Estimated to ship on23 March 2025
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10 G
$237.00
50 G
$854.00
100 G
$1,330.00
500 G
$5,080.00
About This Item
$237.00
Estimated to ship on23 March 2025
Recommended Products
biological source
bovine
Quality Level
Assay
≥96%
form
lyophilized powder
mol wt
~66 kDa
purified by
cold ethanol fractionation
origin
USA origin
technique(s)
ELISA: suitable
blood typing: suitable
microbiological culture: suitable
loss
≤5%
pH
5.2
solubility
water: soluble (40 mg/ml)
UniProt accession no.
foreign activity
BT Virus, none detected
VSV Virus, none detected
storage temp.
2-8°C
Gene Information
bovine ... ALB(280717)
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General description
Bovine serum albumin is a model protein in various studies and is made up of 583 amino acids.[1][2] It is a water-soluble protein with a molecular weight of 66.4kDa. Six α-helices form three homologous domains of BSA. Depending on pH, it undergoes reversible conformational isomerization. The native structure of the protein becomes reactive and flexible on heating.[3]
Application
Biochem/physiol Actions
Certain conformational and primary-sequence epitopes of BSA are suspected allergens in human beef and milk allergies.
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.
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comparable product
Storage Class Code
11 - Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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Related Content
Learn about bovine serum albumin (BSA) structure, molecular weight, function, solubility, how BSA is made, purification methods, applications and purchasing.
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Is this product biotin-free?
1 answer-
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Bonjour y a t-il un risque l'altération du produit si la bovin sérum albumine a été conservée pendant 15 heures en dehors du frigo dans une pièce a température ambiante ?
1 answer-
Product A4503 (Bovine Serum Albumin) will not spoil following storage for 15 hours at ambient room temperature.
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can A4503 product be used for primary neuron preparation?
1 answer-
This product has not been evaluated for mammalian cell culture. Please see the datasheet for the recommended applications for this product:
https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/384/276/a4503dat.pdfHelpful?
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What is the Department of Transportation shipping information for this product?
1 answer-
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.
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Is Product No. A4503, Albumin from bovine serum, tested and found to be endotoxin-free?
1 answer-
No. If you need such a grade, we would recommend Product No. A8806.
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Is Product No. A4503, Albumin from bovine serum, tested and found to be protease-free?
1 answer-
No. If you need such a grade, we would recommend Product No. A3059.
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Do you offer a kit for conjugating ligands to bovine serum albumin (Product A4503)?
1 answer-
Yes. It is our Product No. MBK1.
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Is Product No. A4503, Albumin from bovine serum, of US origin?
1 answer-
It is typically from animals born and raised in the US. You may confirm this information by downloading the Certificate of Origin (CofO) for any lot of A4503 from our website. From the product detail page, simply type in the lot number in the box below the words Certificate of Origin, and click GO.
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Is Product No. A4053, Albumin from bovine serum, sterile? If not, how would recommend sterilizing it?
1 answer-
This product is not necessarily sterile. Solutions of albumin cannot be autoclaved, so in order to sterilize it we would recommend that it be dissolved in the appropriate medium (water, saline or buffered saline), followed by sterile filtration through a low protein-binding membrane.
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