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Bovine Serum Albumin

lyophilized powder, ≥96% (agarose gel electrophoresis)

Albumin bovine serum, Bovine albumin, BSA
Número de CAS:
Número de EC:
Número MDL:

origen biológico



≥96% (agarose gel electrophoresis)


lyophilized powder

mol peso

~66 kDa

purificado por

cold ethanol fractionation


poly bottle of


USA origin


ELISA: suitable
blood typing: suitable
microbiological culture: suitable




6.5-7.5 (1% in 0.15 M sodium chloride)


water: soluble (40 mg/ml)

Nº de acceso UniProt

temp. de almacenamiento


Gene Information

bovine ... ALB(280717)

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Bovine serum albumin has been used-
  • along with BTS (Beltsville thawing solution), for the extension of sperms during sperm motion analysis
  • as a component of modified Krebs-Ringer buffer (dmKRBT)
  • in gel shift analysis


10, 50, 100, 500 g in poly bottle
1, 5 kg in poly drum

Acciones bioquímicas o fisiológicas

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

Nota de preparación

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.

Código de clase de almacenamiento

11 - Combustible Solids



Punto de inflamabilidad F

Not applicable

Punto de inflamabilidad C

Not applicable

Equipo de protección personal

Eyeshields, Gloves, type N95 (US)

Certificado de Análisis

Introduzca el número de lote para buscar un certificado de análisis (COA).

Certificado de origen

Introduzca el número de lote para buscar un Certificado de origen (COO).

  1. Is Product A2153, Albumin from bovine serum (BSA), suitable for use in ELISA?

    We have not tested A2153 in quality control for use in ELISA applications. Because it contains globulins, we would generally not recommend A2153 for use in ELISA.

  2. Is Product A2153, Albumin from bovine serum (BSA), suitable for use in immunoblotting experiments as a blocking agent?

    We have not tested A2153 in quality control for use in immunoblotting applications as a blocking agent. Because it contains globulins, we would generally not recommend A2153 for use as a blocking agent.

  3. Product A2153, Albumin from bovine serum (BSA), powder looks tan in color.  Is this OK?

    The tan color is within specifications. The color can vary because of factors such as concentration of a solution at the time of lyophilization.

  4. Is Product A2153, Albumin from bovine serum (BSA), suitable for cell culture?

    We do not test A2153 for cell culture use, or for any specifications such as endotoxin content. Customers will have to exercise their own judgment as to whether they wish to use A2153 in cell culture, or can search the literature for publications that cite this product number.

  5. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  6. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  7. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  8. What is the Department of Transportation shipping information for this product?

    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. 

  9. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Simple histochemical stain for acrosomes on sperm from several species.
Larson JL and Miller DJ
Molecular Reproduction and Development, 52(4), 445-449 (1999)
Bartolomeo Della Ventura et al.
PloS one, 12(2), e0171754-e0171754 (2017-02-10)
Biosensor-based detection provides a rapid and low-cost alternative to conventional analytical methods for revealing the presence of the contaminants in water as well as solid matrices. Although important to be detected, small analytes (few hundreds of Daltons) are an issue
Mateusz Majda et al.
Developmental cell, 43(3), 290-304 (2017-11-08)
The epidermis of aerial plant organs is thought to be limiting for growth, because it acts as a continuous load-bearing layer, resisting tension. Leaf epidermis contains jigsaw puzzle piece-shaped pavement cells whose shape has been proposed to be a result
Determination of intracellular reactive oxygen species and high mitochondrial membrane potential in Percoll-treated viable boar sperm using fluorescence-activated flow cytometry.
Guthrie HD and Welch GR
Journal of Animal Science, 84(8), 2089-2100 (2006)
Löms Ziegler-Heitbrock et al.
Journal of immunology (Baltimore, Md. : 1950), 171(1), 285-290 (2003-06-21)
The anti-inflammatory cytokine IL-10 can be induced by type I IFNs, but the molecular mechanisms involved have remained elusive. With in silico analysis of the human IL-10 promoter we identified a module consisting of an IFN regulatory factor 1 (IRF-1)

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