Human Cell Biology ELISA Kits 3
Human CTSK (Cathepsin K) CLIA Kit (HUES00441)
- SKU:
- HUES00441
- Product Type:
- ELISA Kit
- ELISA Type:
- CLIA Kit
- Size:
- 96 Assays
- Sensitivity:
- 18.75pg/mL
- Range:
- 31.25-2000pg/mL
- ELISA Type:
- Sandwich
- Synonyms:
- CTS02, CTSO, CTSO1, CTSO2, PKND, PYCD
- Reactivity:
- Human
- Sample Type:
- Serum, plasma and other biological fluids
- Research Area:
- Cell Biology
Description
| Assay type: | Sandwich |
| Format: | 96T |
| Assay time: | 4.5h |
| Reactivity: | Human |
| Detection method: | Chemiluminescence |
| Detection range: | 31.25-2000 pg/mL |
| Sensitivity: | 18.75 pg/mL |
| Sample volume: | 100µL |
| Sample type: | Serum, plasma and other biological fluids |
| Repeatability: | CV < 15% |
| Specificity: | This kit recognizes Human CTSK in samples. No significant cross-reactivity or interference between Human CTSK and analogues was observed. |
This kit uses Sandwich-CLIA as the method. The micro CLIA plate provided in this kit has been pre-coated with an antibody specific to Human CTSK. Standards or samples are added to the appropriate micro CLIA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Human CTSK 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 CTSK, biotinylated detection antibody and Avidin-HRP conjugate will appear fluorescence. The Relative light unit (RLU) value is measured spectrophotometrically by the Chemiluminescence immunoassay analyzer. The RLU value is positively associated with the concentration of Human CTSK. The concentration of Human CTSK in the samples can be calculated by comparing the RLU of the samples to the standard curve.
| UniProt Protein Function: | CTSK: Closely involved in osteoclastic bone resorption and may participate partially in the disorder of bone remodeling. Displays potent endoprotease activity against fibrinogen at acid pH. May play an important role in extracellular matrix degradation. Defects in CTSK are the cause of pycnodysostosis (PKND). PKND is an autosomal recessive osteochondrodysplasia characterized by osteosclerosis and short stature. Belongs to the peptidase C1 family. |
| UniProt Protein Details: | Protein type:Protease; EC 3. 4. 22. 38 Chromosomal Location of Human Ortholog: 1q21 Cellular Component: extracellular region; extracellular space; lysosome Molecular Function:collagen binding; cysteine-type endopeptidase activity; cysteine-type peptidase activity; fibronectin binding; protein binding; proteoglycan binding; serine-type endopeptidase activity Biological Process: collagen catabolic process; extracellular matrix disassembly; proteolysis; proteolysis involved in cellular protein catabolic process; toll-like receptor signaling pathway Disease: Pycnodysostosis |
| NCBI Summary: | The protein encoded by this gene is a lysosomal cysteine proteinase involved in bone remodeling and resorption. This protein, which is a member of the peptidase C1 protein family, is predominantly expressed in osteoclasts. However, the encoded protein is also expressed in a significant fraction of human breast cancers, where it could contribute to tumor invasiveness. Mutations in this gene are the cause of pycnodysostosis, an autosomal recessive disease characterized by osteosclerosis and short stature. [provided by RefSeq, Apr 2013] |
| UniProt Code: | P43235 |
| NCBI GenInfo Identifier: | 1168793 |
| NCBI Gene ID: | 1513 |
| NCBI Accession: | P43235. 1 |
| UniProt Secondary Accession: | P43235,Q6FHS6, |
| UniProt Related Accession: | P43235 |
| Molecular Weight: | 36,966 Da |
| NCBI Full Name: | Cathepsin K |
| NCBI Synonym Full Names: | cathepsin K |
| NCBI Official Symbol: | CTSK |
| NCBI Official Synonym Symbols: | CTSO; PKND; PYCD; CTS02; CTSO1; CTSO2 |
| NCBI Protein Information: | cathepsin K |
| UniProt Protein Name: | Cathepsin K |
| UniProt Synonym Protein Names: | Cathepsin O; Cathepsin O2; Cathepsin X |
| Protein Family: | Cathepsin |
| UniProt Gene Name: | CTSK |
| UniProt Entry Name: | CATK_HUMAN |
As the RLU 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 (pg/mL) | RLU | Average | Corrected |
| 2000 | 53613 57829 | 55721 | 55693 |
| 1000 | 22103 25845 | 23974 | 23946 |
| 500 | 11189 10875 | 11032 | 11004 |
| 250 | 5055 5533 | 5294 | 5266 |
| 125 | 2733 2483 | 2608 | 2580 |
| 62.5 | 1412 1210 | 1311 | 1283 |
| 31.25 | 671 677 | 674 | 646 |
| 0 | 28 28 | 28 | -- |
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human CTSK were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human CTSK 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 (pg/mL) | 107.50 | 247.33 | 853.64 | 115.29 | 243.36 | 802.14 |
| Standard deviation | 13.44 | 18.10 | 56.60 | 14.72 | 23.65 | 56.55 |
| C V (%) | 12.50 | 7.32 | 6.63 | 12.77 | 9.72 | 7.05 |
Recovery
The recovery of Human CTSK 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) | 87-99 | 94 |
| EDTA plasma (n=5) | 87-98 | 92 |
| Cell culture media (n=5) | 91-107 | 99 |
Linearity
Samples were spiked with high concentrations of Human CTSK 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 (%) | 101-116 | 89-101 | 100-117 |
| Average (%) | 107 | 94 | 108 | |
| 1:4 | Range (%) | 89-105 | 100-117 | 104-116 |
| Average (%) | 97 | 107 | 110 | |
| 1:8 | Range (%) | 97-110 | 86-100 | 94-105 |
| Average (%) | 103 | 93 | 99 | |
| 1:16 | Range (%) | 95-107 | 104-117 | 89-102 |
| Average (%) | 101 | 110 | 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 CLIA 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 A | 1 vial, 5 mL | 4°C (shading light) |
| Substrate Reagent B | 1 vial, 5 mL | 4°C (shading light) |
| 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 100µL of Substrate mixture solution to each well. Cover with a new plate seal andincubate for no more than 5 min at 37°C. Protect the plate from light.
- Determine the RLU value of each well immediately.
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