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85878

Sigma-Aldrich

Streptavidin from Streptomyces avidinii

affinity purified, lyophilized from 10 mM potassium phosphate, ≥13 U/mg protein

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1 MG
$190.00
5 MG
$653.00
10 MG
$896.08

$190.00


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1 MG
$190.00
5 MG
$653.00
10 MG
$896.08

About This Item

CAS Number:
MDL number:
UNSPSC Code:
12352202
NACRES:
NA.32

$190.00


In StockDetails


Request a Bulk Order

form

powder

Quality Level

quality

affinity purified
lyophilized from 10 mM potassium phosphate

specific activity

≥13 U/mg protein

mol wt

Mr ~60000

solubility

H2O: 1 mg/mL, clear to hazy, colorless to faintly yellow

storage temp.

−20°C

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General description

Streptavidin is a crystalline protein synthesized by Streptomycetes.[1]

Application

Streptavidin from Streptomyces avidinii has been used:
  • in the pre-functionalization of self-propelled catalytic micromotors[2]
  • in the fabrication and modification of hydroxyapatite-chitosan (HA-CTS) nanofilm-coated substrates[3]
  • as an analyte to bind biomolecules to the gold-inverted polymer solar cells (Au-IPSC)[4]

Biochem/physiol Actions

Streptavidin is a biotin binding protein and has the ability to bind four molecules of biotin.[1] The biotin binding pocket of streptavidin helps to interact with biotin.[5] It can be used to enhance protein binding and multimerization.[6]

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.
The sales quantitites 1 mg and 5 mg

Unit Definition

1 U corresponds to the amount of protein which binds 1μg (+)-biotin at pH 7.5

Analysis Note

Binding capability: Streptavidin binds one molecule of biotin per subunit. Comparison of biotin binding and absorbance measurements indicates that ≤5% binding sites are occupied.

Other Notes

Review: Application of the avidin-biotin technique in microbiology[7]; Protein isolated from the bacterium Streptomyces avidinii, having a high affinity for biotin[8]; Avidin-Biotin technology [9]

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


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Scientific and Clinical Applications of Magnetic Carriers (2013)
Soon Gang Choi et al.
Nature communications, 10(1), 3907-3907 (2019-08-31)
Complementary assays are required to comprehensively map complex biological entities such as genomes, proteomes and interactome networks. However, how various assays can be optimally combined to approach completeness while maintaining high precision often remains unclear. Here, we propose a framework
Capture and identification of heterogeneous circulating tumor cells using transparent nanomaterials and quantum dots-based multiplexed imaging
Chen Y Y, et al.
Journal of Cancer, 7(1), 69-69 (2016)
D.A. Fuccillo
Biotechniques, 3, 494-494 (1985)
Yuan-Yuan Chen et al.
Journal of Cancer, 7(1), 69-79 (2016-01-02)
Capture and identification of circulating tumor cells (CTCs) in the blood system can help guide therapy and predict the prognosis of cancer patients. However, simultaneous capture and identification of CTCs with both epithelial and mesenchymal phenotypes remains a formidable technical

Questions

1–2 of 2 Questions  
  1. What is the atomic mass of this Streptavidin? Is it 66 kDa?

    1 answer
    1. The atomic mass of this product is not characterized for the finished goods. However, according to the following publication, the apparent molecular weight under SDS-PAGE analysis seems to be about 66 kDa. The reference publication is AIMS Biophysics, 7(4): 236–247.

      Helpful?

  2. Is this a recombinant or native protein?

    1 answer
    1. This product is native streptavidin that has been affinity purified from fermentation cultures of Streptomyces avidinii.

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