Donkey F(ab')2 anti-Sheep IgG (H+L) Secondary Antibody [PE] (Pre-adsorbed) Summary
| Description |
This product is stable at 4C as an undiluted liquid. Dilute only prior to immediate use. Centrifuge product if not completely clear after standing at room temperature. Do not freeze after reconstitution. Store reagent in the dark. Use subdued lighting during handling and incubation of cells prior to analysis.
This product was prepared from monospecific antiserum by immunoaffinity chromatography using Sheep IgG coupled to agarose beads followed by solid phase adsorption(s) to remove any unwanted reactivities, pepsin digestion and chromatographic separation. Assay by immunoelectrophoresis resulted in a single precipitin arc against anti-Phycoerythrin, anti-Donkey Serum, Sheep IgG and Sheep Serum |
| Immunogen |
Donkey F(ab')2 anti-Sheep IgG (H+L) Secondary Antibody [PE] (Pre-adsorbed) was produced by repeated immunization with sheep IgG whole molecule in donkey. |
| Specificity |
No reaction was observed against anti-Pepsin, anti-Donkey IgG Fc, or Chicken, Guinea Pig, Hamster, Horse, Human, Mouse, Rabbit or Rat Serum Proteins. |
| Isotype |
IgG |
| Clonality |
Polyclonal |
| Host |
Donkey |
| Purity |
Multi-step |
Applications/Dilutions
| Dilutions |
- Flow Cytometry 1:100 - 1:250
- Immunocytochemistry/ Immunofluorescence 1:100 - 1:250
|
| Application Notes |
This product is suitable for immunomicroscopy and flow cytometry or FACS analysis as well as other antibody based fluorescent assays requiring extremely low background levels, absence of F(c) mediated binding, lot-to-lot consistency, high titer and specificity. The maximum amount of reagent required to stain 1 x 10E6 cells in flow cytometry is approximately 1.0 ug of antibody conjugate. Optimal titers for other applications should be determined by the researcher. |
Packaging, Storage & Formulations
| Storage |
Store at 4C in the dark. Do not freeze. |
| Buffer |
0.02 M Potassium Phosphate, 0.15 M Sodium Chloride, pH 7.2, 10 mg/mL Bovine Serum Albumin (BSA) - Immunoglobulin and Protease free |
| Preservative |
0.01% Sodium Azide |
| Purity |
Multi-step |
Background
Antibodies, also known as immunoglobulins (Igs) are critical for immunity and are grouped into five primary classes: IgG, IgM, IgA, IgD, and IgE. The most abundant antibody isotype is immunoglobulin G (IgG) with concentrations ranging from 7.5-22 mg/ml in human serum and has a molecular weight of 150 kDa. The major effector functions of IgG include neutralization, opsonization, complement fixation and antibody dependent cell-mediated cytotoxicity (ADCC). This monomeric immunoglobulin, expressed on the surface of mature B cells, is often depicted as a Y-shape and comprised of 2 heavy chains and 2 light chains linked by disulfide bonds. The heavy chain is type gamma including subtypes gamma 1, gamma 2, gamma 3, and gamma 4 while the light chain is either a kappa or lambda chain. An IgG molecule has two antigen binding sites, each consisting of a heavy and light chain N-terminal variable domain. When combined with the constant heavy chain 1 (Ch1) and the constant light chain domains, it forms the fragment antigen-binding (Fab) region (2 per antibody). The remaining domains (Ch2-Ch4) of both heavy chains make up the Fc region and contain a site for covalently linking an enzymatic or fluorochrome probe, such as HRP or Janelia Fluor 549, for target detection and visualization (1,2,3).
The 4 IgG subclasses, sharing 95% amino acid identity, include IgG1, IgG2, IgG3, and IgG4 for humans and IgG1, IgG2a, IgG2b, and IgG3 for mice. The relative abundance of each human subclass is 60% for IgG1, 32% for IgG2, 4% for IgG3, and 4% for IgG4. In an IgG deficiency, there may be a shortage of one or more subclasses (4).
References
1. Painter RH. (1998) Encyclopedia of Immunology (Second Edition). Elsevier. 1208-1211
2. Chapter 9 - Antibodies. (2012) Immunology for Pharmacy. Mosby 70-78
3. Schroeder H, Cavacini, L. (2010) Structure and Function of Immunoglobulins. J Allergy Clin Immunol. 125(2 0 2): S41-S52. PMID: 20176268
4. Vidarsson G, Dekkers G, Rispens T. (2014) IgG subclasses and allotypes: from structure to effector functions. Front Immunol. 5:520. PMID: 25368619
Limitations
This product is for research use only and is not approved for use in humans or in clinical diagnosis. Secondary Antibodies are
guaranteed for 1 year from date of receipt.
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