Human Cardiovascular ELISA Kits
Human sENG (Soluble Endoglin) ELISA Kit (HUES03402)
- SKU:
- HUES03402
- Product Type:
- ELISA Kit
- Size:
- 96 Assays
- Uniprot:
- P17813
- Sensitivity:
- 0.09ng/mL
- Range:
- 0.16-10ng/mL
- ELISA Type:
- Sandwich
- Reactivity:
- Human
- Sample Type:
- Serum, plasma and other biological fluids
- Research Area:
- Cardiovascular
Description
| Assay type: | Sandwich |
| Format: | 96T |
| Assay time: | 4.5h |
| Reactivity: | Human |
| Detection Method: | Colormetric |
| Detection Range: | 0.16-10 ng/mL |
| Sensitivity: | 0.10 ng/mL |
| Sample Volume Required Per Well: | 100µL |
| Sample Type: | Serum, plasma and other biological fluids |
| Specificity: | This kit recognizes Human sENG in samples. No significant cross-reactivity or interference between Human sENG and analogues was observed. |
This ELISA kit uses Sandwich-ELISA as the method. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Human sENG. Standards or samples are added to the appropriate micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Human sENG and Avidin-Horseradish Peroxidase (HRP) conjugate are added to each micro plate well successively and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Human sENG, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by adding Stop Solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of Human sENG. The concentration of Human sENG in samples can be calculated by comparing the OD of the samples to the standard curve.
| UniProt Protein Function: | ENG: Major glycoprotein of vascular endothelium. May play a critical role in the binding of endothelial cells to integrins and/or other RGD receptors. Homodimer that forms an heteromeric complex with the signaling receptors for transforming growth factor-beta: TGFBR1 and/or TGFBR2. It is able to bind TGF-beta 1, and 3 efficiently and TGF-beta 2 less efficiently. Interacts with TCTEX1D4. Interacts with ARRB2. Endoglin is restricted to endothelial cells in all tissues except bone marrow. 2 isoforms of the human protein are produced by alternative splicing. |
| UniProt Protein Details: | Protein type:Motility/polarity/chemotaxis; Receptor, misc. ; Membrane protein, integral Chromosomal Location of Human Ortholog: 9q34. 11 Cellular Component: cytoplasm; external side of plasma membrane; extracellular space; focal adhesion; nucleoplasm; receptor complex Molecular Function:activin binding; galactose binding; glycosaminoglycan binding; protein binding; punt binding; transforming growth factor beta binding; transforming growth factor beta receptor, cytoplasmic mediator activity Biological Process: artery morphogenesis; BMP signaling pathway; central nervous system vasculogenesis; heart looping; negative regulation of cell migration; negative regulation of protein amino acid autophosphorylation; patterning of blood vessels; positive regulation of BMP signaling pathway; positive regulation of protein amino acid phosphorylation; regulation of transcription, DNA-dependent; regulation of transforming growth factor beta receptor signaling pathway; smooth muscle development; vasculogenesis; venous blood vessel morphogenesis Disease: Telangiectasia, Hereditary Hemorrhagic, Of Rendu, Osler, And Weber |
| NCBI Summary: | This gene encodes a homodimeric transmembrane protein which is a major glycoprotein of the vascular endothelium. This protein is a component of the transforming growth factor beta receptor complex and it binds to the beta1 and beta3 peptides with high affinity. Mutations in this gene cause hereditary hemorrhagic telangiectasia, also known as Osler-Rendu-Weber syndrome 1, an autosomal dominant multisystemic vascular dysplasia. This gene may also be involved in preeclampsia and several types of cancer. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2013] |
| UniProt Code: | P17813 |
| NCBI GenInfo Identifier: | 3041681 |
| NCBI Gene ID: | 2022 |
| NCBI Accession: | P17813. 2 |
| UniProt Secondary Accession: | P17813,Q14248, Q14926, Q5T9C0, |
| UniProt Related Accession: | P17813 |
| Molecular Weight: | 67,542 Da |
| NCBI Full Name: | Endoglin |
| NCBI Synonym Full Names: | endoglin |
| NCBI Official Symbol: | ENG |
| NCBI Official Synonym Symbols: | END; HHT1; ORW1 |
| NCBI Protein Information: | endoglin |
| UniProt Protein Name: | Endoglin |
| UniProt Synonym Protein Names: | CD_antigen: CD105 |
| Protein Family: | Endoglin |
| UniProt Gene Name: | ENG |
| UniProt Entry Name: | EGLN_HUMAN |
As the OD values of the standard curve may vary according to the conditions of the actual assay performance (e. g. operator, pipetting technique, washing technique or temperature effects), the operator should establish a standard curve for each test. Typical standard curve and data is provided below for reference only.
| Concentration (ng/mL) | O.D | Average | Corrected |
| 10 | 2.321 2.363 | 2.342 | 2.257 |
| 5 | 1.397 1.449 | 1.423 | 1.338 |
| 2.5 | 0.901 0.883 | 0.892 | 0.807 |
| 1.25 | 0.408 0.424 | 0.416 | 0.331 |
| 0.63 | 0.255 0.247 | 0.251 | 0.166 |
| 0.32 | 0.181 0.169 | 0.175 | 0.09 |
| 0.16 | 0.13 0.134 | 0.132 | 0.047 |
| 0 | 0.077 0.093 | 0.085 | -- |
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human sENG were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human sENG were tested on 3 different plates, 20 replicates in each plate.
| Intra-assay Precision | Inter-assay Precision | |||||
| Sample | 1 | 2 | 3 | 1 | 2 | 3 |
| n | 20 | 20 | 20 | 20 | 20 | 20 |
| Mean (ng/mL) | 0.47 | 1.21 | 3.98 | 0.46 | 1.19 | 4.06 |
| Standard deviation | 0.02 | 0.05 | 0.12 | 0.02 | 0.06 | 0.16 |
| C V (%) | 4.26 | 4.13 | 3.02 | 4.35 | 5.04 | 3.94 |
Recovery
The recovery of Human sENG spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.
| Sample Type | Range (%) | Average Recovery (%) |
| Serum (n=5) | 95-110 | 102 |
| EDTA plasma (n=5) | 89-102 | 95 |
| Cell culture media (n=5) | 91-103 | 97 |
Linearity
Samples were spiked with high concentrations of Human sENG and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.
| Serum (n=5) | EDTA plasma (n=5) | Cell culture media (n=5) | ||
| 1:2 | Range (%) | 85-97 | 98-110 | 87-98 |
| Average (%) | 91 | 104 | 93 | |
| 1:4 | Range (%) | 88-103 | 84-98 | 89-102 |
| Average (%) | 95 | 89 | 94 | |
| 1:8 | Range (%) | 88-102 | 82-97 | 90-104 |
| Average (%) | 95 | 89 | 95 | |
| 1:16 | Range (%) | 88-102 | 85-95 | 90-100 |
| Average (%) | 93 | 90 | 95 |
An unopened kit can be stored at 4°C for 1 month. If the kit is not used within 1 month, store the items separately according to the following conditions once the kit is received.
| Item | Specifications | Storage |
| Micro ELISA Plate(Dismountable) | 8 wells ×12 strips | -20°C, 6 months |
| Reference Standard | 2 vials | |
| Concentrated Biotinylated Detection Ab (100×) | 1 vial, 120 µL | |
| Concentrated HRP Conjugate (100×) | 1 vial, 120 µL | -20°C(shading light), 6 months |
| Reference Standard & Sample Diluent | 1 vial, 20 mL | 4°C, 6 months |
| Biotinylated Detection Ab Diluent | 1 vial, 14 mL | |
| HRP Conjugate Diluent | 1 vial, 14 mL | |
| Concentrated Wash Buffer (25×) | 1 vial, 30 mL | |
| Substrate Reagent | 1 vial, 10 mL | 4°C(shading light) |
| Stop Solution | 1 vial, 10 mL | 4°C |
| Plate Sealer | 5 pieces | |
| Product Description | 1 copy | |
| Certificate of Analysis | 1 copy |
- Set standard, test sample and control (zero) wells on the pre-coated plate and record theirpositions. It is recommended to measure each standard and sample in duplicate. Note: addall solutions to the bottom of the plate wells while avoiding contact with the well walls. Ensuresolutions do not foam when adding to the wells.
- Aliquot 100µl of standard solutions into the standard wells.
- Add 100µl of Sample / Standard dilution buffer into the control (zero) well.
- Add 100µl of properly diluted sample (serum, plasma, tissue homogenates and otherbiological fluids) into test sample wells.
- Cover the plate with the sealer provided in the kit and incubate for 90 min at 37°C.
- Aspirate the liquid from each well, do not wash. Immediately add 100µL of BiotinylatedDetection Ab working solution to each well. Cover the plate with a plate seal and gently mix. Incubate for 1 hour at 37°C.
- Aspirate or decant the solution from the plate and add 350µL of wash buffer to each welland incubate for 1-2 minutes at room temperature. Aspirate the solution from each well andclap the plate on absorbent filter paper to dry. Repeat this process 3 times. Note: a microplatewasher can be used in this step and other wash steps.
- Add 100µL of HRP Conjugate working solution to each well. Cover with a plate seal andincubate for 30 min at 37°C.
- Aspirate or decant the solution from each well. Repeat the wash process for five times asconducted in step 7.
- Add 90µL of Substrate Reagent to each well. Cover with a new plate seal and incubate forapproximately 15 min at 37°C. Protect the plate from light. Note: the reaction time can beshortened or extended according to the actual color change, but not by more than 30min.
- Add 50 µL of Stop Solution to each well. Note: Adding the stop solution should be done inthe same order as the substrate solution.
- Determine the optical density (OD value) of each well immediately with a microplate readerset at 450 nm.
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