Description
ID4 Colorimetric Cell-Based ELISA
The Colorimetric Cell Based ELISA kit from AssayGenie is a powerful tool for the accurate detection of Human ANG (Angiogenin) levels in various biological samples including serum, plasma, and cell culture supernatants. This kit is known for its high sensitivity and specificity, ensuring reliable and reproducible results for researchers.Angiogenin is a key protein involved in angiogenesis, playing a crucial role in promoting blood vessel formation and influencing cell proliferation. Its dysregulation has been linked to various diseases such as cancer, cardiovascular diseases, and neurodegenerative disorders, making it a valuable biomarker for studying these conditions and potentially developing therapeutic interventions.
With the AssayGenie Colorimetric Cell Based ELISA kit, researchers can accurately measure angiogenin levels in their samples, enabling deeper insights into disease mechanisms and potential treatment options. Trust in AssayGenie to provide you with the tools you need for cutting-edge research in the field of angiogenesis and beyond.
| Product Name: | ID4 Colorimetric Cell-Based ELISA |
| Product Code: | CBCAB01016 |
| ELISA Type: | Cell-Based |
| Target: | ID4 |
| Reactivity: | Human, Mouse, Rat |
| Dynamic Range: | > 5000 Cells |
| Detection Method: | Colorimetric 450 nmStorage/Stability:4°C/6 Months |
| Format: | 96-Well Microplate |
The ID4 Colorimetric Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can detect ID4 protein expression profile in cells. The kit can be used for measuring the relative amounts of ID4 in cultured cells as well as screening for the effects that various treatments, inhibitors (ie siRNA or chemicals), or activators have on ID4.
Qualitative determination of ID4 concentration is achieved by an indirect ELISA format. In essence, ID4 is captured by ID4-specific primary antibodies while the HRP-conjugated secondary antibodies bind the Fc region of the primary antibody. Through this binding, the HRP enzyme conjugated to the secondary antibody can catalyze a colorimetric reaction upon substrate addition. Due to the qualitative nature of the Cell-Based ELISA, multiple normalization methods are needed:
| 1. | A monoclonal antibody specific for human GAPDH is included to serve as an internal positive control in normalizing the target absorbance values. |
| 2. | Following the colorimetric measurement of HRP activity via substrate addition, the Crystal Violet whole-cell staining method may be used to determine cell density. After staining, the results can be analysed by normalizing the absorbance values to cell amounts, by which the plating difference can be adjusted. |
| Database Information: | Gene ID: 3400, UniProt ID: P47928, OMIM: 600581, Unigene: Hs.519601 |
| Gene Symbol: | ID4 |
| Sub Type: | None |
| UniProt Protein Function: | ID4: ID (inhibitor of DNA binding) HLH proteins lack a basic DNA-binding domain but are able to form heterodimers with other HLH proteins, thereby inhibiting DNA binding. |
| UniProt Protein Details: | Protein type:Transcription, coactivator/corepressor Chromosomal Location of Human Ortholog: 6p22.3 Cellular Component: cytoplasm; nucleus Molecular Function:protein binding; protein dimerization activity; transcription corepressor activity Biological Process: cerebral cortex neuron differentiation; circadian rhythm; fat cell differentiation; G1/S transition of mitotic cell cycle; hippocampus development; myelination in the central nervous system; negative regulation of astrocyte differentiation; negative regulation of fat cell differentiation; negative regulation of neuron differentiation; negative regulation of oligodendrocyte differentiation; negative regulation of transcription from RNA polymerase II promoter; negative regulation of transcription, DNA-dependent; neuroblast proliferation; positive regulation of cell proliferation; positive regulation of osteoblast differentiation; positive regulation of transcription from RNA polymerase II promoter; regulation of transcription from RNA polymerase II promoter; transcription, DNA-dependent |
| NCBI Summary: | This gene encodes a member of the inhibitor of DNA binding (ID) protein family. These proteins are basic helix-loop-helix transcription factors which can act as tumor suppressors but lack DNA binding activity. Consequently, the activity of the encoded protein depends on the protein binding partner. [provided by RefSeq, Dec 2011] |
| UniProt Code: | P47928 |
| NCBI GenInfo Identifier: | 1352422 |
| NCBI Gene ID: | 3400 |
| NCBI Accession: | P47928.1 |
| UniProt Secondary Accession: | P47928,Q13005, |
| UniProt Related Accession: | P47928 |
| Molecular Weight: | 16,622 Da |
| NCBI Full Name: | DNA-binding protein inhibitor ID-4 |
| NCBI Synonym Full Names: | inhibitor of DNA binding 4, HLH protein |
| NCBI Official Symbol: | ID4Â Â |
| NCBI Official Synonym Symbols: | IDB4; bHLHb27Â Â |
| NCBI Protein Information: | DNA-binding protein inhibitor ID-4 |
| UniProt Protein Name: | DNA-binding protein inhibitor ID-4 |
| UniProt Synonym Protein Names: | Class B basic helix-loop-helix protein 27; bHLHb27; Inhibitor of DNA binding 4; Inhibitor of differentiation 4 |
| Protein Family: | DNA-binding protein inhibitor |
| UniProt Gene Name: | ID4Â Â |
| UniProt Entry Name: | ID4_HUMAN |
| Component | Quantity |
| 96-Well Cell Culture Clear-Bottom Microplate | 2 plates |
| 10X TBS | 24 mL |
| Quenching Buffer | 24 mL |
| Blocking Buffer | 50 mL |
| 15X Wash Buffer | 50 mL |
| Primary Antibody Diluent | 12 mL |
| 100x Anti-Phospho Target Antibody | 60 µL |
| 100x Anti-Target Antibody | 60 µL |
| Anti-GAPDH Antibody | 60 µL |
| HRP-Conjugated Anti-Rabbit IgG Antibody | 12 mL |
| HRP-Conjugated Anti-Mouse IgG Antibody | 12 mL |
| SDS Solution | 12 mL |
| Stop Solution | 24 mL |
| Ready-to-Use Substrate | 12 mL |
| Crystal Violet Solution | 12 mL |
| Adhesive Plate Seals | 2 seals |
The following materials and/or equipment are NOT provided in this kit but are necessary to successfully conduct the experiment:
- Microplate reader able to measure absorbance at 450 nm and/or 595 nm for Crystal Violet Cell Staining (Optional)
- Micropipettes with capability of measuring volumes ranging from 1 µL to 1 ml
- 37% formaldehyde (Sigma Cat# F-8775) or formaldehyde from other sources
- Squirt bottle, manifold dispenser, multichannel pipette reservoir or automated microplate washer
- Graph paper or computer software capable of generating or displaying logarithmic functions
- Absorbent papers or vacuum aspirator
- Test tubes or microfuge tubes capable of storing ≥1 ml
- Poly-L-Lysine (Sigma Cat# P4832 for suspension cells)
- Orbital shaker (optional)
- Deionized or sterile water
*Note: Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.
| Step | Procedure |
| 1. | Seed 200 µL of 20,000 adherent cells in culture medium in each well of a 96-well plate. The plates included in the kit are sterile and treated for cell culture. For suspension cells and loosely attached cells, coat the plates with 100 µL of 10 µg/ml Poly-L-Lysine (not included) to each well of a 96-well plate for 30 minutes at 37°C prior to adding cells. |
| 2. | Incubate the cells for overnight at 37°C, 5% CO2. |
| 3. | Treat the cells as desired. |
| 4. | Remove the cell culture medium and rinse with 200 µL of 1x TBS, twice. |
| 5. | Fix the cells by incubating with 100 µL of Fixing Solution for 20 minutes at room temperature. The 4% formaldehyde is used for adherent cells and 8% formaldehyde is used for suspension cells and loosely attached cells. |
| 6. | Remove the Fixing Solution and wash the plate 3 times with 200 µL 1x Wash Buffer for five minutes each time with gentle shaking on the orbital shaker. The plate can be stored at 4°C for a week. |
| 7. | Add 100 µL of Quenching Buffer and incubate for 20 minutes at room temperature. |
| 8. | Wash the plate 3 times with 1x Wash Buffer for 5 minutes each time. |
| 9. | Add 200 µL of Blocking Buffer and incubate for 1 hour at room temperature. |
| 10. | Wash 3 times with 200 µL of 1x Wash Buffer for 5 minutes each time. |
| 11. | Add 50 µL of 1x primary antibodies (Anti-ID4 Antibody and/or Anti-GAPDH Antibody) to the corresponding wells, cover with Parafilm and incubate for 16 hours (overnight) at 4°C. If the target expression is known to be high, incubate for 2 hours at room temperature. |
| 12. | Wash 3 times with 200 µL of 1x Wash Buffer for 5 minutes each time. |
| 13. | Add 50 µL of 1x secondary antibodies (HRP-Conjugated AntiRabbit IgG Antibody or HRP-Conjugated Anti-Mouse IgG Antibody) to corresponding wells and incubate for 1.5 hours at room temperature. |
| 14. | Wash 3 times with 200 µL of 1x Wash Buffer for 5 minutes each time. |
| 15. | Add 50 µL of Ready-to-Use Substrate to each well and incubate for 30 minutes at room temperature in the dark. |
| 16. | Add 50 µL of Stop Solution to each well and read OD at 450 nm immediately using the microplate reader. |
(Additional Crystal Violet staining may be performed if desired – details of this may be found in the kit technical manual.)
