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Scientific Background
Immunoglobulin G (IgG) is a monomeric immunoglobulin, built of two heavy chains γ and two light chains. Each IgG has two antigen binding sites. It is the most abundant immunoglobulin and is approximately equally distributed in blood and in tissue liquids, constituting 75% of serum immunoglobulins in humans. IgG molecules are synthesised and secreted by plasma B cells. IgG antibodies are predominately involved in the secondary antibody response, which occurs approximately one month following antigen recognition, thus the presence of specific IgG generally corresponds to maturation of the antibody response. This is the only isotype that can pass through the human placenta, thereby providing protection to the fetus in utero. Along with IgA secreted in the breast milk, residual IgG absorbed through the placenta provides the neonate with humoral immunity before its own immune system develops.
Assay Principle
This assay employs a two-site sandwich ELISA to quantitate Leptospira in samples. An antibody specific for Leptospira has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and anyLeptospira present is bound by the immobilized antibody. After removing any unbound substances, a biotin-conjugated antibody specific for Leptospira is added to the wells. After washing, Streptavidin conjugated Horseradish Peroxidase (HRP) is added to the wells. Following a wash to remove any unbound avidin-enzyme reagent, a substrate solution is added to the wells and color develops in proportion to the amount of Leptospira bound in the initial step. The color development is stopped and the intensity of the color is measured.
Performance Data
| Assay Type | Sandwich ELISA |
|---|---|
| Detection Range | 1.23-100 μg/mL |
| Sensitivity | 0.59 μg/mL |
| Species Reactivity | Rabbit (Oryctolagus cuniculus) |
| Stability | The stability of ELISA kit is determined by the loss rate of activity. The loss rate of this kit is less than 5% within the expiration date under appropriate storage condition. The loss rate was determined by accelerated thermal degradation test. Keep the kit at 37°C for 4 and 7 days, and compare O.D.values of the kit kept at 37°C with that of at recommended temperature. (referring from China Biological Products Standard, which was calculated by the Arrhenius equation. For ELISA kit, 4 days storage at 37°C can be considered as 6 months at 2 - 8°C, which means 7 days at 37°C equaling 12 months at 2 - 8°C). |
| Manufacturer No. | AE35725RB |
Assay Workflow
The kit includes the components required for standard-curve quantification (see the kit manual for the component table and validated sample types). Absorbance is read on a standard microplate reader and concentrations are interpolated from the standard curve.
Safety & Handling
For research use only (RUO). Not for use in diagnostic or therapeutic procedures. Handle all samples and reagents using standard laboratory safety practices.
Related Products
Explore additional Rabbit ELISA kits from Wuhan Abebio Science Co Ltd, or contact us for related assays for Leptospira research.
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