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/L
H4522
Sérum humain
from human male AB plasma, USA origin, sterile-filtered
Synonyme(s) :
plasma humain, sérum humain, sérums humains
About This Item
Produits recommandés
Source biologique
human male plasma (Type AB)
Niveau de qualité
Stérilité
sterile-filtered
Composition
hemoglobin, ≤30 mg/dL
Origine
USA origin
Technique(s)
cell culture | mammalian: suitable
cell culture | stem cell: suitable
Impuretés
≤10 EU/mL endotoxin
Conditions d'expédition
dry ice
Température de stockage
−20°C
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Application
Actions biochimiques/physiologiques
Conditionnement
Avertissement
Remarque sur l'analyse
Autres remarques
Informations légales
Clause de non-responsabilité
Produit(s) apparenté(s)
Code de la classe de stockage
10 - Combustible liquids
Classe de danger pour l'eau (WGK)
WGK 3
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
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Certificats d'analyse (COA)
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What is the antibodies concentration in Product H4522, human serum?
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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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Are Human Serum products H4522 and H6914 suitable for complement assays? Is there testing available for complement levels or activity?
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Human Serum products H4522 and H6914 may not be suitable for complement assays when stored at -20°C due to potential degradation of complement activity. For complement assays, alternatives like S1764 (Complement sera human) and C9473 (Complement Serum Standard human) are recommended. It is advised to review the Certificates of Analysis (CoAs) for these products to ensure they meet the specific requirements of your complement assay
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What Biosafety Level would be suitable for human serum such as H4522, H5667, and H6914?
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Human origin products from normal donors should be used at Biosafety Level 2 (BSL-2), which is suitable for handling moderate-risk agents causing human disease. Thus, treat these products as potentially infectious and handle accordingly.
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What are the differences between serum and plasma-derived serum?
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Whole blood serum is obtained by allowing natural clotting followed by filtration,lacking fibrinogen. Plasma-derived serum is obtained from non-clotted whole blood through centrifugation.
Utile ?
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what does this do
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Human AB serum is added as a supplement to culture media at a concentration of 2-10% to provide a mixture of nutritional, hormonal, growth, and attachment factors. The serum also acts as a buffer to the cell culture system against a variety of disruptions to cell growth and toxic effects such as pH change, proteolytic activity, or the presence of heavy metals or endotoxin.
Please see the link below for more information:
https://www.sigmaaldrich.com/technical-documents/technical-article/cell-culture-and-cell-culture-analysis/mammalian-cell-culture/serum-cell-tissue-faqUtile ?
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Is product H4522 obtained using Institutional Review Board (IRB)-approved consent forms and protocols?
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According to the supplier:
Each donor unit used in the preparation of this material was tested and found negative for HBsAG, HBV-NAT, HIV-1/2, HCV, HCV-NAT, HIV-1 NAT, and Syphilis per FDA regulations. The human plasma was collected from male donors' blood type AB in FDA licensed commercial donor establishments located in the USA in accordance with ethical standards. Each donor signed an informed consent form prior to collection, which is traceable by the unique identifiable number to maintain anonymity. A quality assurance system is in place to ensure traceability to individual donor. Documentation to this effect is available upon request.Utile ?
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Could you please confirm if the serum contains normal levels of human complement components?
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This product has not been treated to remove or inactivate complement components, however no testing has been performed to confirm these levels. It is a pooled product derived from 50 - 70 donors per lot. Any active complement be expected to meet 'normal levels.
Should complement testing be a requirement, please see product S1764. This is a lyophilized human serum product tested for CH50 activity. See the links below to review a sample Certificate of Analysis and the product datasheet:
S1764 Certificate of Analysis
https://www.sigmaaldrich.com/certificates/sapfs/PROD/sap/certificate_pdfs/COFA/Q14/S1764-1MLSLCQ7524.pdfS1764 Datasheet
https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/408/363/s1764dat.pdfUtile ?
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