Bovine Serum Albumin

lyophilized powder, essentially globulin free, low endotoxin, ≥98% (agarose gel electrophoresis)

Albumin bovine serum, Bovine albumin, BSA
CAS Number:
EC Number:
MDL number:

Quality Level

biological source



≥98% (agarose gel electrophoresis)


lyophilized powder

mol wt

~66 kDa

purified by

heat shock fractionation


poly bottle of


USA origin


ELISA: suitable


essentially globulin free
≤1 ng/mg endotoxin




water: soluble (40 mg/ml)

UniProt accession no.

storage temp.


Gene Information

bovine ... ALB(280717)

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General description

Bovine Serum Albumin (BSA) is a globular non-glycosylated protein that encompasses structurally distinct domains (I, II, and III) with two sub-domains, A and B within each domain. Structurally, BSA is an α-helical protein with 17 cysteine residues.


Bovine Serum Albumin has been used:
  • as a component of the minimal liquid medium to culture Porphyromonas gingivalis strains
  • as a standard protein to quantify microsomes homogenate using Bradford method
  • as a blocking agent in enzyme-linked immunosorbent assay (ELISA) of fecal lactoferrin


25, 100 g in poly bottle

Biochem/physiol Actions

Bovine Serum Albumin (BSA) is widely used in drugs and antibody delivery. It also finds applications in nanoparticle preparations and is useful in targeting tumor tissues. BSA is non-immunogenic and non-toxic. It also shows binding with metal ions.
Certain conformational and primary-sequence epitopes of BSA are suspected allergens in human beef and milk allergies.

Features and Benefits

  • Low endotoxin
  • Essentially globulin-free

Preparation Note

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.


11 - Combustible Solids

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Botros B Shenoda et al.
Current protocols in pharmacology, 79, 9-9 (2017-12-21)
Pharmacogenomic approaches used to investigate how genes affect drug responses are critical for designing personalized therapies aimed at maximizing efficacy and minimizing adverse effects. Drug efficacy is often dependent on the sequence and expression levels of drug target genes or...
Nancy Machorro-Rojas et al.
Molecular medicine reports, 20(3), 2083-2090 (2019-07-02)
The intestinal epithelium is a monolayer of cells arranged side‑by‑side and connected by tight junction (TJ) proteins expressed at the apical extreme of the paracellular membrane. This layer prevents stress‑induced inflammatory responses, thus helping to maintain gut barrier function and...
Tamara Topală et al.
Clujul medical (1957), 87(4), 215-219 (2014-01-01)
The continuous search for new molecules with therapeutic abilities has led to the synthesis and characterization of a large number of metal complexes, proven to exhibit potential as pharmacological agents through their antibacterial, antiviral, antifungal and antineoplastic properties. As serum...
Robert W Crawford et al.
Infection and immunity, 76(11), 5341-5349 (2008-09-17)
Salmonella enterica serovar Typhi can establish a chronic, asymptomatic infection of the human gallbladder, suggesting that this bacterium utilizes novel mechanisms to mediate enhanced colonization and persistence in a bile-rich environment. Gallstones are one of the most important risk factors...
Emily Turner-Brannen et al.
Arthritis research & therapy, 13(4), R129-R129 (2011-08-13)
Innate defence regulator (IDR) peptides are synthetic cationic peptides, variants of naturally occurring innate immune effector molecules known as host defence peptides. IDR peptides were recently demonstrated to limit infection-associated inflammation selectively without compromising host innate immune functions. This study...

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