| Field | Specification |
|---|---|
| Target | |
| Alternative names | Insulin-like growth factor I;IGF-I;Mechano growth factor;MGF;Somatomedin-C;IGF1;IBP1; |
| Gene ID | |
| UniProt # | |
| Reactivity | |
| Applications | |
| Immunogen | Expression system for standard: E.coli; Immunogen sequence: G49-A118 |
| Expression system | |
| Expression region | |
| Assay type | |
| Sample type(s) | Cell Culture Supernatant, Serum, Plasma |
| Sensitivity | |
| Detection range | |
| Assay time | |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Assay Principle
This sandwich ELISA quantifies bovine insulin-like growth factor 1 (gene IGF1) in cell culture supernatants, serum and plasma (heparin, EDTA). 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.
Insulin-like growth factor 1 (IGF-1) is a peptide hormone, produced mainly by the liver under growth hormone control, that is structurally related to insulin. Acting through the IGF-1 receptor, it promotes cell growth, proliferation and survival and mediates many effects of growth hormone on body growth and metabolism.
Kit Components
| Anti-Bovine IGF1 Pre-coated 96-well strip microplate | 1 plate (96 wells) |
|---|---|
| Bovine IGF1 Standard | 2 vials, 10 ng/tube |
| Bovine IGF1 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 | Bovine |
|---|---|
| Sample types | Cell culture supernatants, serum and plasma (heparin, EDTA) |
| Assay range | 156 pg/mL–10,000 pg/mL |
| Sensitivity | <50 pg/mL |
| Standard | Recombinant bovine IGF1 (Gly49–Ala118), expressed in E. coli |
| Cross-reactivity | No detectable cross-reactivity with IGF-2 |
| Intra-assay CV | 4.1–4.3% (3 samples, n = 16 each) |
| Inter-assay CV | 6.6–7.1% (3 samples, n = 24 each) |
| Format | 96 wells, removable strips |
Example standard curve (OD450, pg/mL): 0 = 0.056; 156 = 0.106; 312 = 0.142; 625 = 0.214; 1250 = 0.357; 2500 = 0.616; 5000 = 1.064; 10000 = 1.809. 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 | 156 | 312 | 625 | 1250 | 2500 | 5000 | 10000 |
| O.D. | 0.056 | 0.106 | 0.142 | 0.214 | 0.357 | 0.616 | 1.064 | 1.809 |
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) | 264 | 870 | 2892 | 298 | 962 | 3741 |
| Standard deviation | 11.09 | 37.41 | 118.57 | 19.67 | 65.42 | 265.61 |
| CV (%) | 4.2% | 4.3% | 4.1% | 6.6% | 6.8% | 7.1% |
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.
Activating reagent preparation
IGF-1 is mostly contained as inactive form in samples, please activate it before assay. Don't activate recombinant IGF-1.
Solution A: 1N HCI: add 8.33ml of 12N HCI into 91.67ml of H2O.
Solution B: 1.2N NaOH/0.5M HEPES: add 12ml of 10N NaOH and 11.9g HEPES into 75ml of H2O, add H2O to adjust volume to 100ml.
Sample activation procedure
Activate the sample
Cell culture supernate: add activating reagent pro rata, i.e. add 20ul of Solution A into 100ul of sample, 10 min later, add 20ul of Solution B. PH 7.0-7.6.
Serum, plasma (heparin, EDTA): add activating reagent pro rata, i.e. add 20ul of Solution A into 40ul of sample, 10 min later, add 20ul of Solution B. PH 7.0-7.6.
It is unnecessary to activate the recombinant IGF-1.
Sample was diluted partly after adding activating reagent, so please pay attention to this when calculate target protein concentration.
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