Human CTXⅡ(Cross Linked C-telopeptide of Type Ⅱ Collagen) ELISA Kit

  • Cat.No.:E-EL-H0837

  • Reactivity: Human

To Purchase E-EL-H0837

  • 96T
  • 48T
  • 24T
  • 96T*5
  • 96T*10
Price: $495

Product Details


Assay type Sandwich-ELISA
Format 96T/48T
Assay time 3.5h
Detection range 0.16-10 ng/mL
Sensitivity 0.10 ng/mL
Sample type &Sample volume serum, plasma and other biological fluids; 100μL
Specificity This kit recognizes Human CTXⅡ in samples. No significant cross-reactivity or interference between Human CTXⅡ and analogues was observed.
Reproducibility Both intra-CV and inter-CV are < 10%.
Application This ELISA kit applies to the in vitro quantitative determination of Human CTXⅡ concentrations in serum, plasma and other biological fluids.

Test Principle

This ELISA kit uses the Sandwich-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Human CTXⅡ. Standards or samples are added to the micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Human CTXⅡ and Avidin-Horseradish Peroxidase (HRP) conjugate are added successively to each micro plate well and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Human CTXⅡ, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by the addition of 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 CTXⅡ. You can calculate the concentration of Human CTXⅡ in the samples by comparing the OD of the samples to the standard curve.

Kit components & Storage

An unopened kit can be stored at 2-8℃ for 1 month. If the kit is not supposed to be used within 1 month, store the components separately according to the following conditions once the kit is received.
Micro ELISA Plate(Dismountable) 96T: 8 wells ×12 strips
48T: 8 wells ×6 strips
-20℃, 6 months
Reference Standard 96T: 2 vials
48T: 1 vial
Concentrated Biotinylated Detection Ab (100×) 96T: 1 vial, 120 μL
48T: 1 vial, 60 μL
Concentrated HRP Conjugate (100×) 96T: 1 vial, 120 μL
48T: 1 vial, 60 μL
-20℃(Protect from light), 6 months
Reference Standard & Sample Diluent 1 vial, 20 mL 2-8°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 2-8℃(Protect from light)
Stop Solution 1 vial, 10 mL 2-8°C
Plate Sealer 5 pieces
Manual 1 copy
Certificate of Analysis 1 copy

Technical Data


Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human CTXⅡ were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human CTXⅡ 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) 0.50 1.10 4.60 0.50 1.00 4.20
Standard deviation 0.03 0.05 0.14 0.03 0.06 0.20
CV (%) 6.00 4.55 3.04 6.00 6.00 4.76


The recovery of Human CTXⅡ 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=8) 92-103 98
EDTA plasma (n=8) 88-98 93
Cell culture media (n=8) 85-100 92


Samples were spiked with high concentrations of Human CTXⅡ and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.

Target Information


Assay Procedures

elisa assay procedure 1

1. Add 100μL standard or sample to the wells. Incubate for 90 min at 37°C

elisa assay procedure 2

2. Discard the liquid, immediately add 100μL Biotinylated Detection Ab working solution to each well. Incubate for 60 min at 37°C

elisa assay procedure 3

3. Aspirate and wash the plate for 3 times

elisa assay procedure 4

4. Add 100μL HRP conjugate working solution. Incubate for 30 min at 37°C. Aspirate and wash the plate for 5 times

elisa assay procedure 5

5. Add 90μL Substrate Reagent. Incubate for 15 min at 37°C

elisa assay procedure 6

6. Add 50μL Stop Solution

elisa assay procedure 7

7. Read the plate at 450nm immediately. Calculation of the results


From now on, if you have published a paper by using any of our products since 1/1/2019, fill out the “Elabscience Publication Reward Application Form”carefully and send it to orders@elabscience.com, we will get back to you with the reward after we confirm it ASAP!

View more details about our Publication Reward >>

  1. Biosensors & Bioelectronics (2015) IF: 7.78
    Detection Of CTX-II In Serum And Urine To Diagnose Osteoarthritis By Using A Fluoro-Microbeads Guiding Chip.

    DOI: 10.1016/j.bios.2014.08.016

    PMID: 25172026

    Sample: Serum,Urine
  2. bmc musculoskeletal disorders (2018) IF: 2.002
    Influência de um protocolo de treinamento em circuito na gordura intermuscular da coxa, composi??o corporal, parametros clínicos, funcionais e metabólicos de pacientes com osteoartrite de joelho

    PMID: 99999999

    Sample: Urine
  3. BioMed Research International (2018) IF: 2.583
    Clinical and Biological Signature of Osteochondritis Dissecans in a Cross-Sectional Study.

    DOI: 10.1155/2018/5458704

    PMID: 29998134

    Sample: Serum
  4. Central-European Journal of Immunology (2020) IF: 1.415
    Joint remodeling outcome of serum levels of Dickkopf-1 (DKK1), cartilage oligomeric matrix protein (COMP), and C-telopeptide of type II collagen (CTXII) in rheumatoid arthritis

    DOI: 10.5114/ceji.2020.94685

    PMID: 32425683

    Sample: Serum
  5. BMC musculoskeletal disorders (2018) IF: 1.998
    Influence of a periodized circuit training protocol on intermuscular adipose tissue of patients with knee osteoarthritis: protocol for a randomized controlled trial

    DOI: 10.1186/s12891-018-2325-y

    PMID: 30497420

    Sample: Urine
  6. Archives Of Rheumatology (2017) IF: 0.312
    Which Predicts Quadriceps Muscle Strength In Knee Osteoarthritis: Biological Markers Or Clinical Variables.

    DOI: 10.5606/ArchRheumatol.2017.5919

    PMID: 30375528

    Sample: Serum
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