Description
Human CALD (Caldesmon) ELISA Kit
The Human CALD (Caldesmon) ELISA Kit is an essential tool for the precise measurement of caldesmon levels in human samples such as serum, plasma, and cell culture supernatants. With its exceptional sensitivity and specificity, this kit provides accurate and consistent results, making it perfect for a variety of research purposes.Caldesmon is a key regulator of smooth muscle contraction and cell motility, playing a crucial role in various physiological processes. Dysregulation of caldesmon has been linked to conditions like cancer, cardiovascular diseases, and neurological disorders, highlighting its significance as a biomarker for studying these diseases and exploring potential therapeutic interventions.
Overall, the Human CALD (Caldesmon) ELISA Kit is an invaluable tool for researchers investigating the role of caldesmon in health and disease, offering reliable data that can contribute to advancements in medical research and treatment strategies.
| Assay type: | Sandwich |
| Format: | 96T |
| Assay time: | 4.5h |
| Reactivity: | Human |
| Detection Method: | Colormetric |
| Detection Range: | 0.31-20 ng/mL |
| Sensitivity: | 0.19 ng/mL |
| Sample Volume Required Per Well: | 100µL |
| Sample Type: | Serum, plasma and other biological fluids |
| Specificity: | This kit recognizes Human CALD in samples. No significant cross-reactivity or interference between Human CALD 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 CALD. 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 CALD 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 CALD, 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 CALD. The concentration of Human CALD in samples can be calculated by comparing the OD of the samples to the standard curve.
| UniProt Protein Function: | Caldesmon: a cytoskeletal protein implicated in the regulation of actomyosin interactions in smooth muscle and nonmuscle cells. May act as a bridge between myosin and actin filaments. Stimulates actin binding of tropomyosin which increases the stabilization of actin filament structure. In muscle tissues, inhibits the actomyosin ATPase by binding to F-actin. This inhibition is attenuated by calcium-calmodulin and is potentiated by tropomyosin. Interacts with actin, myosin, two molecules of tropomyosin and with calmodulin. Also plays an essential role during cellular mitosis and receptor capping. Five alternatively spliced isoforms have been described. |
| UniProt Protein Details: | Protein type:Actin-binding Chromosomal Location of Human Ortholog: 7q33 Cellular Component: actin cap; actin cytoskeleton; cytoskeleton; cytosol; myofibril; plasma membrane Molecular Function:actin binding; calmodulin binding; myosin binding; protein binding; tropomyosin binding Biological Process: cell motility; muscle contraction |
| NCBI Summary: | This gene encodes a calmodulin- and actin-binding protein that plays an essential role in the regulation of smooth muscle and nonmuscle contraction. The conserved domain of this protein possesses the binding activities to Ca(2+)-calmodulin, actin, tropomyosin, myosin, and phospholipids. This protein is a potent inhibitor of the actin-tropomyosin activated myosin MgATPase, and serves as a mediating factor for Ca(2+)-dependent inhibition of smooth muscle contraction. Alternative splicing of this gene results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Jul 2008] |
| UniProt Code: | Q05682 |
| NCBI GenInfo Identifier: | 338817891 |
| NCBI Gene ID: | 800 |
| NCBI Accession: | Q05682. 3 |
| UniProt Secondary Accession: | Q05682,Q13978, Q13979, Q14741, Q14742, Q9UD91, A8K0X1 |
| UniProt Related Accession: | Q05682 |
| Molecular Weight: | 65,620 Da |
| NCBI Full Name: | Caldesmon |
| NCBI Synonym Full Names: | caldesmon 1 |
| NCBI Official Symbol: | CALD1 |
| NCBI Official Synonym Symbols: | CDM; HCAD; LCAD; H-CAD; L-CAD; NAG22 |
| NCBI Protein Information: | caldesmon |
| UniProt Protein Name: | Caldesmon |
| Protein Family: | Caldesmon |
| UniProt Gene Name: | CALD1 |
| UniProt Entry Name: | CALD1_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 |
| 20 | 2.297 2.323 | 2.31 | 2.238 |
| 10 | 1.487 1.529 | 1.508 | 1.436 |
| 5 | 0.887 0.867 | 0.877 | 0.805 |
| 2.5 | 0.453 0.491 | 0.472 | 0.4 |
| 1.25 | 0.257 0.253 | 0.255 | 0.183 |
| 0.63 | 0.176 0.158 | 0.167 | 0.095 |
| 0.31 | 0.112 0.13 | 0.121 | 0.049 |
| 0 | 0.063 0.081 | 0.072 | -- |
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human CALD were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human CALD 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) | 1.09 | 3.17 | 8.61 | 1.17 | 2.86 | 9.39 |
| Standard deviation | 0.07 | 0.18 | 0.44 | 0.08 | 0.13 | 0.42 |
| C V (%) | 6.42 | 5.68 | 5.11 | 6.84 | 4.55 | 4.47 |
Recovery
The recovery of Human CALD 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) | 86-101 | 92 |
| EDTA plasma (n=5) | 86-99 | 92 |
| Cell culture media (n=5) | 90-106 | 97 |
Linearity
Samples were spiked with high concentrations of Human CALD 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 (%) | 84-98 | 96-111 | 91-103 |
| Average (%) | 90 | 101 | 98 | |
| 1:4 | Range (%) | 87-100 | 84-95 | 85-97 |
| Average (%) | 92 | 89 | 90 | |
| 1:8 | Range (%) | 91-107 | 87-100 | 88-103 |
| Average (%) | 98 | 92 | 95 | |
| 1:16 | Range (%) | 88-103 | 84-94 | 82-95 |
| Average (%) | 95 | 89 | 89 |
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.
