Rat Cathepsin K,cath-K ELISA Kit

Code CSB-E09439r
Size 96T,5×96T,10×96T
Trial Size 24T ELISA kits trial application
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Product Details


This Rat CTSK ELISA Kit was designed for the quantitative measurement of Rat CTSK protein in serum, plasma, tissue homogenates. It is a Sandwich ELISA kit, its detection range is 15.6 pg/mL-1000 pg/mL and the sensitivity is 3.9 pg/mL.

Target Name cathepsin K
Alternative Names Ctsk ELISA Kit; Cathepsin K ELISA Kit; EC ELISA Kit
Abbreviation CTSK
Uniprot No. O35186
Species Rattus norvegicus (Rat)
Sample Types serum, plasma, tissue homogenates
Detection Range 15.6 pg/mL-1000 pg/mL
Sensitivity 3.9 pg/mL
Assay Time 1-5h
Sample Volume 50-100ul
Detection Wavelength 450 nm
Research Area Signal Transduction
Assay Principle quantitative
Measurement Sandwich
Intra-assay Precision (Precision within an assay): CV%<8%        
Three samples of known concentration were tested twenty times on one plate to assess.    
Inter-assay Precision (Precision between assays): CV%<10%        
Three samples of known concentration were tested in twenty assays to assess.      
To assess the linearity of the assay, samples were spiked with high concentrations of rat cath-K in various matrices and diluted with the Sample Diluent to produce samples with values within the dynamic range of the assay.  
  Sample Serum(n=4)    
1:1 Average % 104    
Range % 100-107    
1:2 Average % 99    
Range % 95-103    
1:4 Average % 85    
Range % 80-90    
1:8 Average % 107    
Range % 103-110    
The recovery of rat cath-K spiked to levels throughout the range of the assay in various matrices was evaluated. Samples were diluted prior to assay as directed in the Sample Preparation section.  
Sample Type Average % Recovery Range    
Serum (n=5) 86 83-89    
EDTA plasma (n=4) 95 90-100    
Typical Data
These standard curves are provided for demonstration only. A standard curve should be generated for each set of samples assayed.  
pg/ml OD1 OD2 Average Corrected    
1000 2.801 2.765 2.783 2.682    
500 2.342 2.204 2.273 2.172    
250 1.343 1.406 1.375 1.274    
125 0.679 0.701 0.690 0.589    
62.5 0.399 0.405 0.402 0.301    
31.2 0.251 0.242 0.247 0.146    
15.6 0.166 0.164 0.165 0.064    
0 0.102 0.100 0.101      
ELISA Data Analysis Watch ELISA data processing video & download Curve Expert if needed
and FAQs
Storage Store at 2-8°C. Please refer to protocol.
Lead Time 3-5 working days

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Target Background

(From Uniprot)
Thiol protease 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. Involved in the release of thyroid hormone thyroxine (T4) by limited proteolysis of TG/thyroglobulin in the thyroid follicle lumen.
Gene References into Functions
  1. the present study identified icariin as a novel therapeutic agent in DXM-induced cartilage injury in rats, and revealed that the activation of miR-206 targeting of cathepsin K may be responsible for the chondroprotective efficacy of icariin PMID: 29207029
  2. cathepsin K, in both its secreted and lysosomal forms, may play a role in the degradation of Sertoli cell residual bodies PMID: 14585819
  3. In conclusion, according to its ability to modulate hypotensive effects of kinins, we propose that cathepsin K is a kininase of biological relevance. PMID: 17181996
  4. Comparison of the S2 site between rat and human cathepsin K sequences indicated that two S2 residues at Ser134 and Val160 in rat are varied to Ala and Leu, respectively, in the human enzyme. PMID: 18664521
  5. The expression pattern of Ctsk in osteoclasts in physiological root resorption in the rat molar was determined. PMID: 18974601

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Subcellular Location Lysosome. Secreted. Apical cell membrane; Peripheral membrane protein; Extracellular side.
Protein Families Peptidase C1 family
Database Links

KEGG: rno:29175

STRING: 10116.ENSRNOP00000028730

UniGene: Rn.5598

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