The stability of this material in solution, when stored at -70 °C, has not been evaluated. However, Albumin containing solutions are generally stable when stored at -20 to -80 °C in single use aliquots for at least 1 year. Also note that a number of sterile prepared BSA solutions currently available may be stored at 2–8 °C with assigned retest dates that range from 2 – 4 years from the date of Quality Release. Albumin is quite stable in solution and freezer storage may not be necessary.
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| A ustedes/SKU | Disponibilidad | Precio |
|---|---|---|
10 g | Póngase en contacto con nuestro Servicio de Atención al Cliente para disponibilidad | 163,00 € |
50 g | Póngase en contacto con nuestro Servicio de Atención al Cliente para disponibilidad | 458,00 € |
100 g | Póngase en contacto con nuestro Servicio de Atención al Cliente para disponibilidad | 770,00 € |
500 g | Póngase en contacto con nuestro Servicio de Atención al Cliente para disponibilidad | 2920,00 € |
1 kg | Póngase en contacto con nuestro Servicio de Atención al Cliente para disponibilidad | 4420,00 € |
5 kg | Póngase en contacto con nuestro Servicio de Atención al Cliente para disponibilidad | 19.900,00 € |
Acerca de este artículo
163,00 €
biological source
bovine
Quality Segment
assay
≥98%
form
lyophilized powder
purified by
heat shock fractionation
origin
USA origin
concentration
≥95% protein
free fatty acid content
≤0.02%
technique(s)
ELISA: suitable, blood typing: suitable, ligand binding assay: suitable
impurities
essentially globulin free
loss
≤5%
pH
7
solubility
water: soluble (40 mg/ml)
UniProt accession no.
foreign activity
protease ≤0.005 U/mg
storage temp.
2-8°C
Gene Information
bovine ... ALB(280717)
General description
En esta BSA se han evaluado y probado específicamente las siguientes propiedades:
- Contenido muy bajo de proteasas / ausencia de proteasas
- Contenido muy bajo de ácidos grasos / ausencia de ácidos grasos
La BSA sin proteasas es especialmente útil para aplicaciones como:
- Ensayos enzimáticos
- Ensayos basados en proteínas
- Técnicas sensibles a proteasas que incluyen:
b. Hibridación de ácidos nucleicos
c. Radioinmunoanálisis (RIA)
Application
- como constituyente del medio utilizado para la diferenciación de las células madre pluripotentes humanas
- en el enzimoinmunoanálisis de absorción (ELISA) y el ELISA tipo sándwich
- para permeabilizar las células corticales fetales
Esta BSA A7030 se ha utilizado específicamente como componente del tampón bloqueante en un ensayo ELISA basado en péptidos para el análisis de muestras COVID-19 / SARS-CoV-2 (Poh, C.K. et al., Nat.Commun ., 11(1), 2806 (2020)).
Biochem/physiol Actions
Features and Benefits
- Preparada mediante fraccionamiento térmico
- Sin proteasas
- Sin ácidos grasos
- Esencialmente exenta de globulina
Preparation Note
1 of 1
Este artículo | |||
|---|---|---|---|
| technique(s) ELISA: suitable, ligand binding assay: suitable, blood typing: suitable | technique(s) ELISA: suitable, western blot: suitable | technique(s) blood typing: suitable, microbiological culture: suitable | technique(s) cell culture | mammalian: suitable |
| assay ≥98% | assay ≥98% | assay ≥96% | assay ≥96% (agarose gel electrophoresis) |
| origin USA origin | origin USA origin | origin USA origin | origin USA origin |
| biological source bovine | biological source bovine | biological source bovine | biological source bovine |
| Quality Level 300 | Quality Level 300 | Quality Level 200 | Quality Level 300 |
| form lyophilized powder | form lyophilized powder | form lyophilized powder | form lyophilized powder |
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Clase de almacenamiento
11 - Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves
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Would there be any concerns storing diluted aliquots at -70C for long term storage (1 year) or is it recommended still at 2-8C?
1 respuesta-
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What is the concentration or percentage of fatty acid free?
1 respuesta-
The minimum allowable free fatty acid content is ≤ 0.02% (w/w), as determined by enzymatic assay. A review of recent lots indicates typical values of 0.00% free fatty acids. This information is lot-specific and reported in the Certificate of Analysis. Please see the link below to access a sample or lot-specific Certificate:
https://www.sigmaaldrich.com/product/sigma/a7030#product-documentation¿Le ha resultado útil?
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Is this product biotin-free?
1 respuesta-
This product is not routinely tested for Biotin. However, this material is dialyzed with a 10 kDa cutoff membrane. This dialysis step removes small molecules such as biotin, which has a molecular weight of less than 500 Da. Therefore, this product is considered low in biotin, helping to prevent interference with streptavidin–biotin binding.
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If this material was inadvertently stored at room temperature, what is the room temperature stability?
1 respuesta-
This product is shipped at ambient temperature and is stable at ambient temperature for up to two weeks. For long term storage refrigerated temperature is recommended.
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How long would a 20% BSA solution be stable in water stored at 4C?
1 respuesta-
If stored at 2-8 °C, a filter sterilized 20% BSA solution in water or aqueous buffer is generally stable for a minimum of 2.5 - 3 years.
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Is it possible that BSA contains ions such as Mg2+? I am considering adding it to the buffer, but I am concerned that it might activate the enzyme.
1 respuesta-
The magnesium content of this material is not routinely tested, but historical data indicates that three lots contained between 10-20 parts per million. Water is used as the pre-lyophilization solvent.
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Is product number A7030, Bovine Serum Albumin (BSA) glycosylated?
1 respuesta-
Unfortunately, there is currently no information available regarding the glycosylation status of BSA product A7030.
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How does protease content determined? With this value all proteases are included? Or only refers to plasmatic proteases.
1 respuesta-
The specific method used to test this material for protease activity is considered proprietary. However, it is based on the enzymatic cleavage of FITC-Casein. See the link below to review the FITC-Casein Enzymatic Assay to demonstrate the principal of this method.
https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/353/850/c3777enz.pdf¿Le ha resultado útil?
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what is the expiry of this product?
1 respuesta-
This product is not assigned an expiration date. It is assigned a recommended retest date of 5 years after the quality release date. The recommended retest date is the period of time during which the product is expected to remain within established stability specifications, provided that it has been stored under defined conditions. After the Retest Date, product samples should be examined to ensure that the product is still in compliance with the established specifications. For more information, you may access the "Product Dating Information" document under "ADDITIONAL USEFUL DOCUMENTS ABOUT OUR PRODUCTS" at the bottom of the Quality Services page with this link: https://www.sigmaaldrich.com/US/en/life-science/quality-and-regulatory-management/quality-services.
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What is the extinction coefficient of this product?
1 respuesta-
The extinction coefficient for item A7030 has not been determined.
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