This serum product is pooled from multiple donors. Typical pooled batches range from 50 – 70 donors, but large batches may have up to 200. The general health and/or underlying condition information is not collected from individual donors. Based on electrophoresis studies, the pooled final product may be considered ‘Normal’ serum.
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| Tamanho/SKU | Disponibilidade | Preço |
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Sobre este item
biological source
human male plasma (Type AB)
Quality Segment
sterility
sterile-filtered
composition
hemoglobin, ≤30 mg/dL
origin
USA origin
technique(s)
cell culture | mammalian: suitable, cell culture | stem cell: suitable
impurities
≤10 EU/mL endotoxin
shipped in
dry ice
storage temp.
−20°C
Application
Biochem/physiol Actions
Packaging
Analysis Note
Other Notes
Legal Information
Disclaimer
1 of 1
Este Item | |||
|---|---|---|---|
| description from human male AB plasma, USA origin, sterile-filtered | description Heat Inactivated, from human male AB plasma, USA origin, sterile-filtered | description from platelet poor human plasma, sterile-filtered, (mycoplasma tested, virus tested) | description Heat Inactivated (from male AB clotted whole blood), USA origin, sterile-filtered |
| biological source human male plasma (Type AB) | biological source human male plasma (Type AB) | biological source human | biological source human |
| origin USA origin | origin USA origin | origin USA origin | origin USA origin |
| sterility sterile-filtered | sterility sterile-filtered | sterility sterile-filtered | sterility sterile-filtered |
| technique(s) cell culture | mammalian: suitable, cell culture | stem cell: suitable | technique(s) cell culture | mammalian: suitable | technique(s) cell culture | mammalian: suitable | technique(s) cell culture | stem cell: suitable, cell culture | mammalian: suitable |
| composition hemoglobin, ≤30 mg/dL | composition hemoglobin, ≤20 mg/dL | composition - | composition Hemoglobin, ≤25 mg/dL |
| storage temp. −20°C | storage temp. −20°C | storage temp. −20°C | storage temp. −20°C |
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Classe de armazenamento
10 - Combustible liquids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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Is this product obtained from healthy individuals? I noted that each donor unit used in the preparation was tested and found negative for HBsAG, HIV and etc. However, does each donor was tested for any underlying diseases like Diabetes and medically fit?
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안녕하세요, 혹시 해당 제품의 -20도에서 보관기간을 알 수 있을요?
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This product should be stored at -20°C. The storage period at this temperature is valid up to the lot-specific expiration date printed on the product label or COA. The information requested is lot-specific and reported in the Certificate of Analysis. Please see the link below to access a Certificate of lot interest:
https://www.sigmaaldrich.com/product/sigma/h4522#product-documentationHelpful?
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Is this serum contain Uric acid? If yes how much, or how to check it?. If the serum is expired, is it okay to use?
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While uric acid is present in human serum, this product is not tested for uric acid levels. Should uric acid measurement is required, see product MAK483, Uric Acid Assay Kit, which is suitable for the determination of Uric acid in serum. It is not recommended to use products that are beyond the assigned expiration date.
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Once the product has been thawed, how should it be stored? How many times can be freezed and thawed?
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After the initial thaw, the serum can be aliquoted in to single use vials and stored at -20°C. For more information, please refer to the following page:
https://www.sigmaaldrich.com/technical-documents/protocol/cell-culture-and-cell-culture-analysis/cell-culture-media-preparation/storing-and-thawing-serumHelpful?
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Is this Human Serum stock in PBS or any specific buffer?
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This product does not contain phosphate-buffered saline or any specific buffer.
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What is the concentration of Mg2+ and Ca2+ in this serum (H4522)?
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The magnesium levels are not determined for this serum product. The calcium levels are not tested on a lot-to-lot basis. However, historical information indicates calcium concentrations tend to range from 6.5 - 10 mg/dL.
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What is the antibodies concentration in Product H4522, human serum?
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The immunoglobulin concentration of this product is not measured. This is a pooled product from adult AB negative males. Based on information published in the Geigy Scientific Tables, the average immunoglobulin levels for adult males, ages 20 – 70, are as follows:
IgG
10.69 – 12.04 g./L
IgA
1.32 – 2.34 g/L
IgM (not age dependent)
0.77 g/LHelpful?
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Il prodotto è stato testato per negatività a HSV?
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Each donor is tested for and found non-reactive to Hepatitis B & C and non-reactive to Human Immunodeficiency Virus (HIV) antibody by ELISA. HSV is not on the list of agents that are tested. Nevertheless, products of human origin should be considered potentially infectious and handled accordingly. See the link below to review a sample or lot specific Certificate of Analysis for this product: https://www.sigmaaldrich.com/product/sigma/i4506#product-documentation
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If this is "serum" derived from "plasma" the plasma would have contained anti-coagulant. To turn the plasma into serum it has to be clotted. Has this product been clotted to remove the fibrin? Or is it still in fact plasma?
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The product has been clotted. Blood is collected and treated with citrate (anticoagulant) which inhibits clotting initially. The blood is then centrifuged. When the spin is complete, layers will appear which allow a differentiation between the cells and the plasma. The plasma is removed and calcium is added to activate the clotting cascade. The preparation is then centrifuged again and the result is a large clot which is pelleted to the bottom of the tube with a serum layer on top.
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Which human serum is recommend for a nucleic acid stability assay, specifically for incubating siRNA in serum to represent bloodstream kinetics?
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The use of human serum for a nucleic acid stability assay has not been performed as it is not part of our lab's product characterization focus. However, the citation titled "Improving gene silencing of siRNAs via tricyclo-DNA modification, PMID: 21687522" suggest that product H4522 may be suitable for this application. It is recommended to refer to the publication for additional insights.
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