Description
Human alpha1ACT (Alpha1 Antichymotrypsin) ELISA Kit
The Human Alpha 1-Antichymotrypsin ELISA Kit is designed for the precise measurement of alpha 1-antichymotrypsin levels in human samples such as serum, plasma, and cell culture supernatants. This kit offers high sensitivity and specificity, ensuring accurate and consistent results, making it suitable for a variety of research applications. Alpha 1-Antichymotrypsin is a protease inhibitor that plays a crucial role in inflammation and tissue repair processes.
It is associated with conditions such as Alzheimer's disease, rheumatoid arthritis, and cancer, making it a valuable biomarker for studying these diseases and developing potential treatments. With this ELISA kit, researchers can effectively assess alpha 1-antichymotrypsin levels in human samples, providing valuable insights into disease mechanisms and potential therapeutic targets.
| Assay type: | Sandwich |
| Format: | 96T |
| Assay time: | 4.5h |
| Reactivity: | Human |
| Detection Method: | Colormetric |
| Detection Range: | 1.25-80 ng/mL |
| Sensitivity: | 0.75 ng/mL |
| Sample Volume Required Per Well: | 100µL |
| Sample Type: | Serum, plasma and other biological fluids |
| Specificity: | This kit recognizes Human alpha1ACT in samples. No significant cross-reactivity or interference between Human alpha1ACT 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 alpha1ACT. 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 alpha1ACT 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 alpha1ACT, 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 alpha1ACT. The concentration of Human alpha1ACT in samples can be calculated by comparing the OD of the samples to the standard curve.
| UniProt Protein Function: | SERPINA3: Although its physiological function is unclear, it can inhibit neutrophil cathepsin G and mast cell chymase, both of which can convert angiotensin-1 to the active angiotensin-2. Belongs to the serpin family. 3 isoforms of the human protein are produced by alternative splicing. |
| UniProt Protein Details: | Protein type:Secreted, signal peptide; Secreted Chromosomal Location of Human Ortholog: 14q32. 1 Cellular Component: extracellular space; extracellular region; intracellular; nucleus Molecular Function:serine-type endopeptidase inhibitor activity; protein binding; DNA binding Biological Process: regulation of lipid metabolic process; maintenance of gastrointestinal epithelium; acute-phase response; inflammatory response |
| NCBI Summary: | The protein encoded by this gene is a plasma protease inhibitor and member of the serine protease inhibitor class. Polymorphisms in this protein appear to be tissue specific and influence protease targeting. Variations in this protein's sequence have been implicated in Alzheimer's disease, and deficiency of this protein has been associated with liver disease. Mutations have been identified in patients with Parkinson disease and chronic obstructive pulmonary disease. [provided by RefSeq, Jul 2008] |
| UniProt Code: | P01011 |
| NCBI GenInfo Identifier: | 112874 |
| NCBI Gene ID: | 12 |
| NCBI Accession: | P01011. 2 |
| UniProt Related Accession: | P01011 |
| Molecular Weight: | |
| NCBI Full Name: | Alpha-1-antichymotrypsin |
| NCBI Synonym Full Names: | serpin family A member 3 |
| NCBI Official Symbol: | SERPINA3 |
| NCBI Official Synonym Symbols: | ACT; AACT; GIG24; GIG25 |
| NCBI Protein Information: | alpha-1-antichymotrypsin |
| UniProt Protein Name: | Alpha-1-antichymotrypsin |
| UniProt Synonym Protein Names: | Cell growth-inhibiting gene 24/25 protein; Serpin A3Alpha-1-antichymotrypsin His-Pro-less |
| Protein Family: | Agmatine coumaroyltransferase |
| UniProt Gene Name: | SERPINA3 |
| UniProt Entry Name: | AACT_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 |
| 80 | 2.322 2.37 | 2.346 | 2.272 |
| 40 | 1.66 1.664 | 1.662 | 1.588 |
| 20 | 0.993 0.985 | 0.989 | 0.915 |
| 10 | 0.521 0.533 | 0.527 | 0.453 |
| 5 | 0.261 0.257 | 0.259 | 0.185 |
| 2.5 | 0.186 0.166 | 0.176 | 0.102 |
| 1.25 | 0.125 0.127 | 0.126 | 0.052 |
| 0 | 0.066 0.082 | 0.074 | -- |
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human alpha1ACT were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human alpha1ACT 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) | 4.11 | 9.96 | 32.82 | 3.94 | 9.74 | 31.19 |
| Standard deviation | 0.27 | 0.58 | 1.13 | 0.20 | 0.46 | 1.14 |
| C V (%) | 6.57 | 5.82 | 3.44 | 5.08 | 4.72 | 3.66 |
Recovery
The recovery of Human alpha1ACT 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) | 91-107 | 98 |
| EDTA plasma (n=5) | 86-99 | 93 |
| Cell culture media (n=5) | 86-96 | 91 |
Linearity
Samples were spiked with high concentrations of Human alpha1ACT 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 (%) | 96-113 | 85-95 | 94-107 |
| Average (%) | 103 | 90 | 99 | |
| 1:4 | Range (%) | 95-105 | 81-93 | 86-97 |
| Average (%) | 100 | 85 | 92 | |
| 1:8 | Range (%) | 91-104 | 88-98 | 84-95 |
| Average (%) | 97 | 93 | 90 | |
| 1:16 | Range (%) | 88-102 | 81-94 | 85-98 |
| Average (%) | 94 | 88 | 91 |
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 100 µL of standard solutions into the standard wells.
- Add 100 µL of Sample / Standard dilution buffer into the control (zero) well.
- Add 100 µL 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 100 µL 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 350 µL 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 100 µL 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 90 µL 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.
