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Key Documents

Safety Information

A5611

Sigma-Aldrich

Bovine Serum Albumin

Cohn Fraction V, lyophilized powder, ≥96% (agarose gel electrophoresis)

Synonym(s):

Albumin bovine serum, BSA, Bovine albumin

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About This Item

CAS Number:
9048-46-8
EC Number:
232-936-2
MDL number:
MFCD00130384
UNSPSC Code:
12352202
NACRES:
NA.25

biological source

bovine

Quality Level

200

Assay

≥96% (agarose gel electrophoresis)

form

lyophilized powder

mol wt

~66 kDa

packaging

poly bottle of

origin

USA origin

technique(s)

immunohistochemistry: suitable

pH

4.8-7.5

solubility

H2O: soluble 40 mg/mL, clear to slightly hazy, yellow

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This Item
A3608A2153A3733
Bovine Serum Albumin Cohn Fraction V, lyophilized powder, ≥96% (agarose gel electrophoresis)

A5611

Bovine Serum Albumin

Bovine Serum Albumin lyophilized powder, ≥96% (agarose gel electrophoresis)

A3608

Bovine Serum Albumin

Bovine Serum Albumin lyophilized powder, ≥96% (agarose gel electrophoresis)

A2153

Bovine Serum Albumin

Bovine Serum Albumin lyophilized powder, ≥98% (agarose gel electrophoresis)

A3733

Bovine Serum Albumin

technique(s)

immunohistochemistry: suitable

technique(s)

immunoprecipitation (IP): suitable

technique(s)

ELISA: suitable, blood typing: suitable, microbiological culture: suitable

technique(s)

flow cytometry: suitable

origin

USA origin

origin

New Zealand origin

origin

USA origin

origin

New Zealand origin

assay

≥96% (agarose gel electrophoresis)

assay

≥96% (agarose gel electrophoresis)

assay

≥96% (agarose gel electrophoresis)

assay

≥98% (agarose gel electrophoresis)

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

form

lyophilized powder

form

lyophilized powder

form

lyophilized powder

form

lyophilized powder

General description

Serum albumins are soluble constituents of the circulatory system. Bovine serum albumin (BSA) is homologous to human serum albumin (HSA). BSA consists of three homologous domains (I, II, III), that are separated into nine loops by disulfide bonds.[1] Serum albumin acts as a depot protein.[1]

Application

Bovine Serum Albumin has been used:
  • for in vitro high molecular weight (HMW)-species formation assay[2]
  • for immunohistochemistry[3]
  • in Escherichia coli quantitative polymerase chain reaction (qPCR) analysis[4]

Biochem/physiol Actions

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

Preparation Note

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.
This is a cold alcohol fractionated albumin that is produced by Sigma-Aldrich with a stricter adherence to the original Cohn method of fractionation than other commercially available bovine albumins.

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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    Certificates of Analysis (COA)

    Lot/Batch Number
    0000433053
    0000433053
    0000408837
    0000364236
    0000360927

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