| Field | Specification |
|---|---|
| Target | |
| Alternative names | Tumor necrosis factor receptor superfamily member 11B;Osteoclastogenesis inhibitory factor;Osteoprotegerin;TNFRSF11B;OCIF, OPG; |
| Gene ID | |
| UniProt # | |
| Reactivity | |
| Applications | |
| Immunogen | Expression system for standard: NS0; Immunogen sequence: E22-L401 |
| Expression system | |
| Expression region | |
| Assay type | |
| Sample type(s) | Cell Culture Supernatant, Serum, Plasma, Saliva, Urine |
| Sensitivity | |
| Detection range | |
| Assay time | |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Assay Principle
This sandwich ELISA quantifies human tumor necrosis factor receptor superfamily member 11B (gene TNFRSF11B) in cell culture supernatants, serum, plasma (heparin, EDTA), saliva and urine. Strips are pre-coated with a capture antibody. After the sample is added, a biotinylated detection antibody binds the captured protein, and an avidin–biotin–peroxidase complex supplies the enzyme. TMB develops color in proportion to the bound target; the reaction is stopped and read at 450 nm, and concentrations are read from the standard curve.
Osteoprotegerin (OPG, TNFRSF11B) is a secreted decoy receptor that binds RANKL and blocks its interaction with RANK. This prevents osteoclast formation and activation, so the local RANKL/OPG ratio is a key determinant of bone mass. OPG can also bind TRAIL and is studied in bone metabolism, vascular calcification and cancer.
Kit Components
| Anti-Human TNFRSF11B Pre-coated 96-well strip microplate | 1 plate (96 wells) |
|---|---|
| Human TNFRSF11B Standard | 2 vials, 10 ng/tube |
| Human TNFRSF11B Biotinylated antibody (100x) | 100 µL |
| Avidin-Biotin-Peroxidase Complex (100x) | 100 µL |
| Sample Diluent | 30 mL |
| Antibody Diluent | 12 mL |
| Avidin-Biotin-Peroxidase Diluent | 12 mL |
| Color Developing Reagent (TMB) | 10 mL |
| Stop Solution | 10 mL |
| Wash Buffer (25x) | 20 mL |
| Adhesive plate sealers | 4 |
Also required (not supplied): microplate reader for 450 nm; incubator; automated plate washer (optional); precision pipettes for 0.5 µL through 1 mL volumes of aqueous solutions; multichannel pipettes (recommended for many samples); deionized or distilled water; 500 mL graduated cylinders; test tubes for dilution.
Kit components are not sold separately.
Performance Data
| Species | Human |
|---|---|
| Sample types | Cell culture supernatants, serum, plasma (heparin, EDTA), saliva and urine |
| Assay range | 93.7 pg/mL–6,000 pg/mL |
| Sensitivity | <5 pg/mL |
| Standard | Recombinant human TNFRSF11B (Glu22–Leu401), expressed in NS0 |
| Cross-reactivity | None detected against related proteins in supplier testing |
| Intra-assay CV | 4.2–7.9% (3 samples, n = 16 each) |
| Inter-assay CV | 5.1–8.9% (3 samples, n = 24 each) |
| Format | 96 wells, removable strips |
Sample dilution: start at 1:1. In the supplier’s tests, serum and plasma samples measured about 50 pg/mL.
Example standard curve (OD450, pg/mL): 0 = 0.014; 93.8 = 0.051; 187.5 = 0.09; 375 = 0.193; 750 = 0.406; 1500 = 0.726; 3000 = 1.465; 6000 = 1.897. Run a new standard curve on every plate.
Storage & Handling
Store at 4 °C for up to 6 months or −20 °C for up to 12 months. Avoid repeated freeze–thaw cycles. Ships on gel ice and tolerates up to 3 days at room temperature; freeze on arrival.
Safety
Sample data
| Concentration (pg/ml) | 0 | 93.8 | 187.5 | 375 | 750 | 1500 | 3000 | 6000 |
| O.D. | 0.014 | 0.051 | 0.09 | 0.193 | 0.406 | 0.726 | 1.465 | 1.897 |
Intra/inter assay consistency
| Intra-Assay Precision | Inter-Assay Precision | |||||
|---|---|---|---|---|---|---|
| Sample | 1 | 2 | 3 | 1 | 2 | 3 |
| n | 16 | 16 | 16 | 24 | 24 | 24 |
| Mean (pg/ml) | 132 | 650 | 2696 | 130 | 692 | 2678 |
| Standard deviation | 10.42 | 37.7 | 113.23 | 11.57 | 51.2 | 136.57 |
| CV (%) | 7.9% | 5.8% | 4.2% | 8.9% | 7.4% | 5.1% |
Kit components
Description|Quantity Pre-coated 96-well strip microplate|1 Standard|2 vials Biotinylated antibody (100x)|100ul Avidin-Biotin-Peroxidase Complex (100x)|100ul Sample Diluent|30ml Antibody Diluent|12ml Avidin-Biotin-Peroxidase Diluent|12ml Color Developing Reagent (TMB)|10ml Stop Solution|10ml Wash Buffer (25x)|20ml Adhesive plate sealers|4Materials required but not provided
- Microplate Reader capable of reading absorbance at 450nm.
- Incubator.
- Automated plate washer (optional).
- Pipettes and pipette tips capable of precisely dispensing 0.5 µl through 1 ml volumes of aqueous solutions.
- Multichannel pipettes are recommended for large amount of samples.
- Deionized or distilled water.
- 500ml graduated cylinders.
- Test tubes for dilution.
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