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Bovine Serum Albumin

heat shock fraction, lyophilized powder, essentially fatty acid free, ≥98% (agarose gel electrophoresis)

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

Nivel de calidad


origen biológico



≥98% (agarose gel electrophoresis)


lyophilized powder

mol peso

~66 kDa

purificado por

heat shock fractionation


poly bottle of


USA origin


cell culture | mammalian: suitable


≤0.005% Fatty acids


≤5.0%, Loss on drying




water: soluble (40 mg/ml)


suitable for ELISA applications (as diluent)

Nº de acceso UniProt

temp. de almacenamiento


Gene Information

bovine ... ALB(280717)

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Descripción general

Bovine serum albumin (BSA) is a 66.4 kDa, water-soluble protein composed of 583 amino acids. It has a single polypeptide chain with three homologous domains formed by six α-helices. Depending on pH, it undergoes reversible conformational isomerization. The native structure of the protein becomes reactive and flexible on heating. BSA has been used as a model protein in various applications, including immunodiagnostic procedures, cell culture media and clinical chemistry. Serum albumins facilitates drug disposition and efficacy by maintaining osmotic blood pressure.


Bovine Serum Albumin has been used:
  • to prevent nonspecific adsorption of fibrin matrices to tissue culture plates
  • as a constituent in the preparation of albumin droplets
  • as a supplement in L-15 medium to increase spermatogonia number without enhancing the growth of somatic cells
  • as a standard protein to evaluate metal oxide adsorption isotherms

Among its many applications, BSA is a fatty acid (FA) carrier. Thus when BSA is used in applications like cell culture, it is important to exercise control over particular FA′s for cell culture, because specific fatty acids can affect different cell lines in a variable manner. In order to control fatty acid content in cell culture, fatty acid-free BSA is useful, for researchers to be able fatty acids specific to their cell lines. Fatty acid-free BSA also allows for optimal and maximum binding sites for the specific FA′s to use in cell culture. The use of FA-free BSA also addresses concerns about endogenous fatty acids that might be potentially present in non-FA-free BSA.


10, 50, 100 g in poly bottle

Acciones bioquímicas o fisiológicas

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

Características y beneficios

  • Heat shock fractionated
  • Essentially fatty acid-free

Nota de preparación

Prepared using heat shock fractionation. Further purified to reduce fatty acid content.
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

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Certificado de origen

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The role of inertial cavitation in acoustic droplet vaporization
Fabiilli ML, et al.
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 56(5), 1006-1017 (2009)
Protein adsorption onto metal oxide materials in white wine model systems
Pachova V, et al.
Journal of Food Science, 67(6), 2118-2121 (2002)
Improved in vitro culture conditions to enhance the survival, mitotic activity, and transplantability of rainbow trout type a spermatogonia
Shikina S and Yoshizaki G
Biology of Reproduction, 83(2), 268-276 (2010)
Initial investigation of acoustic droplet vaporization for occlusion in canine kidney
Zhang M, et al.
Ultrasound in Medicine & Biology, 36(10), 1691-1703 (2010)
Ninette Genster et al.
Scientific reports, 7(1), 3852-3852 (2017-06-22)
Ficolins are a family of pattern recognition molecules that are capable of activating the lectin pathway of complement. A limited number of reports have demonstrated a protective role of ficolins in animal models of infection. In addition, an immune modulatory


Fluorescent in situ Hybridization (FISH)

Available Fluorescent in situ hybridization (FISH) procedures, reagents and equipment.

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