Human COMP/Thrombospondin 5 ELISA Kit PicoKine®

COMP/Thrombospondin-5 ELISA kit for Human

Human COMP/Thrombospondin 5 ELISA Kit PicoKine™ (96 Tests). Quantitate Human COMP in cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA). Sensitivity: 10pg/ml. Cited in 8 publication(s).

Product Info Summary

SKU: EK0913
Size: 96 wells/kit, with removable strips.
Reactive Species: Human
Application: ELISA
Sample Types: cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA).

Customers Who Bought This Also Bought

Product Name

Human COMP/Thrombospondin 5 ELISA Kit PicoKine®

View all COMP/Thrombospondin-5 ELISA kits

SKU/Catalog Number



96 wells/kit, with removable strips.

*Question: How many samples can I assay/run in this kit?


Human COMP/Thrombospondin 5 ELISA Kit PicoKine™ (96 Tests). Quantitate Human COMP in cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA). Sensitivity: 10pg/ml.

Storage & Handling

Store at 4°C for 6 months, at -20°C for 12 months. Avoid multiple freeze-thaw cycles (Ships with gel ice, can store for up to 3 days in room temperature. Freeze upon receiving.)

Cite This Product

Human COMP/Thrombospondin 5 ELISA Kit PicoKine® (Boster Biological Technology, Pleasanton CA, USA, Catalog # EK0913)

Clonality of Antibodies

See Datasheet for details


Expression system for standard: NS0; Immunogen sequence: Q21-A757


<10 pg/ml

Assay Range

156 pg/ml - 10,000 pg/ml


There is no detectable cross-reactivity with other relevant proteins.

Reactive Species

EK0913 is reactive to COMP in Human samples

Validated Sample Types

cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA).

Application Guarantee

EK0913 is guaranteed for ELISA in Human by Boster Guarantee

See how Boster Bio validate our ELISA kits: ELISA Validation Information

Background of COMP/Thrombospondin-5

Cartilage oligomeric matrix protein is a protein that in humans is encoded by the COMP gene. The sequences of rat and bovine COMP indicate that it is a member of the thrombospondin gene family. By Southern blot analysis of a somatic cell hybrid DNA panel and by isotopic in situ hybridization, human COMP gene was mapped to 19p13.1, and the murine COMP gene was mapped to the central region of mouse chromosome 8 by use of an interspecific backcross mapping panel. COMP is a marker of cartilage turnover.

Kit Components

Catalog Number Description Quantity
EK0913-CAP Anti-Human COMP Pre-coated 96-well strip microplate 1
EK0913-ST Human COMP Standard 2 vials, 10 ng/tube
EK0913-DA Human COMP Biotinylated antibody (100x) 100ul
AR1103 Avidin-Biotin-Peroxidase Complex (100x) 100ul
AR1106-1 Sample Diluent 30ml
AR1106-2 Antibody Diluent 12ml
AR1106-3 Avidin-Biotin-Peroxidase Diluent 12ml
AR1104 Color Developing Reagent (TMB) 10ml
AR1105 Stop Solution 10ml
AR1106-5 Wash Buffer (25x) 20ml
PLA-SEA Adhesive plate sealers 4

*The kit components are not available for individual purchase.

Materials Required But Not Included In Kit

  • Microplate Reader capable of reading absorbance at 450nm.
  • Automated plate washer (optional).
  • Pipettes and pipette tips capable of precisely dispensing 0.5 µl through 1 ml volumes of aqueous solutions.
  • Multichannel pipettes are recommended for large amount of samples.
  • Deionized or distilled water.
  • 500ml graduated cylinders.
  • Test tubes for dilution.

Innovating Scientists Reward

If you are the first to review this product, or if you have results for a special sample, species or application this product is not validated in, share your results with us and receive product credits you can use towards any Boster products! Applicable to all scientists world wide.

Submit A Review

Validation Standard Curve O.D. At 450nm

Concentration (pg/ml)015631262512502500500010000

Data Example Images

Intra Assay Consistency & Inter Assay Consistency

We measured random samples of Human COMP/Thrombospondin 5 ELISA Kit PicoKine® within the same batch/lot to ensure the consistency of the kits' performances. ELISA intra assay consistency is measured using wells from the same plate/assay kit. ELISA inter assay consistency is measured using wells from different plates from the same batch production/lot.

Intra-Assay PrecisionInter-Assay Precision
Mean (pg/ml)2331997493525518935413
Standard deviation9.78137.79246.7512.49138.18281.47
CV (%)4.2%6.9%5%4.9%7.3%5.2%


We ensure reproducibility by testing three samples with differing concentrations of COMP/Thrombospondin-5 in ELISA kits from four different production batches/lots.

LotsLot 1 (pg/ml)Lot 2 (pg/ml)Lot 3 (pg/ml)Lot 4 (pg/ml)Mean (pg/ml)Standard DeviationCV (%)
Sample 123320323422322312.455.5%
Sample 219972142194918281979112.465.6%
Sample 349355185458849864923215.044.3%
*number of samples for each test n=16.

Gene/Protein Information For COMP (Source: Uniprot.Org, NCBI)

Uniprot ID


Gene ID


Gene Name


Full Name

Cartilage oligomeric matrix protein




thrombospondin family

Alternative Names

cartilage oligomeric matrix protein (pseudoachondroplasia, epiphyseal dysplasia1, multiple); cartilage oligomeric matrix protein; cartilage oligomeric matrix protein(pseudoachondroplasia, epiphyseal dysplasia1, multiple); COMP; EDM1; EPD1; MED; MEDMGC131819; MGC149768; PSACH; pseudoachondroplasia (epiphyseal dysplasia 1, multiple); THBS5; Thrombospondin5; Thrombospondin-5; TSP5 COMP CTS2, EDM1, EPD1, MED, PSACH, THBS5, TSP5 cartilage oligomeric matrix protein cartilage oligomeric matrix protein|cartilage oligomeric matrix protein (pseudoachondroplasia, epiphyseal dysplasia 1, multiple)|pseudoachondroplasia (epiphyseal dysplasia 1, multiple)|thrombospondin-5

*if product is indicated to react with multiple species, protein info is based on the gene entry specified above in "species".

For more info on COMP, check out the COMP Infographic

COMP infographic

We have 30,000+ of these available, one for each gene! check them out.

In this infographic you will see the following information for COMP: database IDs, super-family, protein function, synonyms, molecular weight, chromosomal locations, tissues of expression, subcellular locations, post translational modifications, and related diseases, research areas & pathways. If you want to see more information included, or would like to contribute to it and be acknowledged, please contact us [email protected]

EK0913 has been cited in 8 publications:

*The publications in this section are manually curated by our staff scientists. They may differ from Bioz's machine gathered results. Both are accurate. If you find a publication citing this product but is missing from this list, please let us know we will issue you a thank-you coupon.

Sex-Specific Associations between Cartilage Structure and Metabolism at Rest and Acutely Following Walking and Drop-Landing:

Effects of Whole Body Vibration Exercise associated with Quadriceps Resistance Exercise on functioning and quality of life in patients with knee osteoarthritis: a randomized controlled trial:

Platelet-rich plasma inhibits Wnt/β-catenin signaling in rabbit cartilage cells activated by IL-1β

Lesser lower extremity mechanical loading associates with a greater increase in serum cartilage oligomeric matrix protein following walking in individuals with anterior cruciate ligament reconstruction

Serum cartilage oligomeric matrix protein as a biomarker for predicting development and progression of knee osteoarthritis

Chen,D.,Hu,W.,Xie,L.,Xiang,G.,Wu,Q.,Qu,J.,Li,S.,Guan,L.,& Liu,D.(2021).EXPRESS: Serum Cartilage Oligomeric Matrix Protein is decreased in patients with Pulmonary Hypertension: a potential protective factor.Pulmonary Circulation.
Species: Human

Platelet Rich Plasma Regulates Wnt/Beta-Catenin Signal Pathway in Rabbit Chondrocytes by Mediating Interleukin 1 Beta. XH ZUO,N SUN,P.XIE,L.WANG,YN SI,H.G.BAO,AND Q.X.ZHANG
Species: New Zealand White Rabbit

Plut D,Faganel Kotnik B,Preložnik Zupan I,Ključevšek D,Vidmar G,Snoj Ž,Salapura V. Detection and evaluation of haemophilic arthropathy: Which tools may be considered more reliable. Haemophilia.2020 Nov 8. doi: 10.1111/hae.14153.Epub ahead of print.PMID:33
Species: Human

Have you used Human COMP/Thrombospondin 5 ELISA Kit PicoKine®?

Submit a review and receive an Amazon gift card.

  • $25/€18/£15/$25CAN/¥75 Yuan/¥1250 Yen for a review with an image
  • $10/€7/£6/$10 CAD/¥70 Yuan/¥1110 Yen for a review without an image

Submit A Review

Be the first to review Human COMP/Thrombospondin 5 ELISA Kit PicoKine®

*The first user to submit a review for a product is eligible for Boster's Innovating Scientists Reward, which gives product credits. This is in addition to the gift card reward.

Have a question?

Find answers in Q&As, reviews.

Can't find your answer?

Submit your question

10 Customer Q&As for Human COMP/Thrombospondin 5 ELISA Kit PicoKine®


Q: can you suggest the dilution ratio of serum samples for detection of COMP in Human serum? I am trying to measure a few analytes and it requires 100ul of diluted samples for each well. We have low serum quantitys so we like to dilute as much as possible.

Verified Customer

Verified customer

Asked: 2020-03-21


A: unable to know the physiological or pathological context of your samples we cannot recommend a dilution ratio without performing a pilot test with your samples. Here is how you can perform a pilot study on your own: perform a serial dilution of your samples on the COMP ELISA kit to make sure you have a linear ascending curve followed by a plateau, which signifies the samples saturating the detection limit of the kit. Then you can pick the dilution ratios from samples in the linear part of the curve as your experimental dilution ratio.
If you are interested in using our ELISA service, you can also send us your sample and we will take care of everything for you. You can check our service details here:
Since you mentioned you have limited samples, our cost effective multiplex ELISA service would fit perfectly for your needs, where we can generate dozens of data points using as little as 25ul sample volume. Information on this service is also in the above link.

Boster Scientific Support

Answered: 2020-03-21


I hope that you're doing well. Is product EK0913 predicted to work in Rat samples?

Verified Customer

Verified customer

Asked: 2019-12-05


We do not recommend the customer to use EK0913 on rat samples.

Boster Scientific Support

Answered: 2019-12-05


Q: what is the protocol regarding preparation of cell lysates prepared for use in Picokine® ELISA kits?

Verified Customer

Verified customer

Asked: 2019-09-30


A: in those Picokine® ELISAs where cell or tissue lysate is a validated sample type, sample preparation instructions for lysate are present in the product insert. Components in lysate and lysis buffer may affect immunoreactivity, so if lysate is not a validated sample type, care must be taken in sample preparation and validation.

Boster Scientific Support

Answered: 2019-09-30


Has EK0913 been tested for bovine reactivity?

Verified customer

Asked: 2019-09-11


The Human COMP/Thrombospondin 5 ELISA Kit PicoKine™ (EK0913) hasn't been tested for bovine reactivity.

Boster Scientific Support

Answered: 2019-09-12


Were both antibodies raised against the standard (aa 21-757), or were either of them raised against a shorter immunogen for EK0913?

Verified customer

Asked: 2019-09-11


For the Human COMP/Thrombospondin 5 ELISA Kit PicoKine™ (EK0913), both antibodies were raised against the standard (aa 21-757).

Boster Scientific Support

Answered: 2019-09-12


Q: which procedure should I follow in order to thaw whole blood sample for COMP ELISA after freezing?

Verified Customer

Verified customer

Asked: 2019-02-27


A: we do not recommend freezing and thaw whole blood. erythrocytes are fragile and, if frozen and thawed, will undergo hemolysis rendering the samples useless. To keep your blood samples to test COMP for a later time, you should let the blood clot in glass tubes and collect the serum to freeze for later use.

Boster Scientific Support

Answered: 2019-02-27


For the kit EK0913 we have on file that the standard is produced using an NS0 expression system. A customer asks for the source of the promoter use on the expression vector for this recombinant protein. Would you have this information available to share?

Verified Customer

Verified customer

Asked: 2018-07-02


We can not provide this information.

Boster Scientific Support

Answered: 2018-07-02


Q: how long can samples (cell cultures, serum, and plasma) be stored and still be stable for measuring COMP using the EK0913 Human COMP Picokine® ELISA Kit?

V. Dayal

Verified customer

Asked: 2017-12-27


A: Boster Bio does not evaluate sample stability. Variations in sample collection, processing, and storage may change the stabilityof samples. It is recommend to assay sample right after collection when possible, or aliquot into single use volumes and store samples frozen. limit repetitive freeze-thaw cycles with the stored samples in order to limit protein degradation.

Boster Scientific Support

Answered: 2017-12-27


Q: What is the optimal O.D. value for COMP ELISA kit? I performed your COMP ELISA on serum samples. For my positive control, I received an O.D. value of 0.826, while my negative control received a value of 0.136. I obtained both of these controls from the ELISA kit, where your kit's typical data shows O.D. values much higher than my positive control and your background is lower. My samples O.D. values are around 0.225 and the highest is only 0.357. is it safe to say these samples contain COMP even though the O.D. values are not very high?

Verified Customer

Verified customer

Asked: 2016-04-19


A: The absolute O.D. values may change according to incubation time. The more you incubate the higher the O.D. values are going to be. an important assessment should be is whether your sample O.D. values are statistically significantly higher than your blank values. in the above example, you could extend your development time in the substrate incubation step to obtain higher O.D. values, as long as your negative controls' O.D. values are not increasing faster in proportion to your positive controls. normally, a sample with O.D. value 2 standard deviations higher than your negative controls can be considered positive. We calculate the sensitivity of this ELISA kit by changeing cutoff O.D. value, calculated as the average of 20 negative controls plus 2 standard deviations of the 20 negative controls, into a concentration. in other words, when we claim this COMP ELISA kit to have sensitivity of 10pg/ml, that means the minimum amount of COMP that can be declared/interpreted as positive by the above standard is 10pg/ml.

Boster Scientific Support

Answered: 2016-04-19


Q: how do I analyze ELISA data? I measured COMP level in serum.

Verified Customer

Verified customer

Asked: 2014-10-07


A: we recommend you this article on ELISA data analysis. Boster also provides a free tool that you can use to analyze ELISA data.

Boster Scientific Support

Answered: 2014-10-07


Ask a question

Get A Quote

Ships directly to USA and Canada. For other regions, visit our distributors page

Bulk Inquiry

Sample Inquiry

In stock
Order Product



Download troubleshooting handbooks for IHC, Western blot and ELISA for FREE.

Download Free PDFs Now

Boster Guarantee

Guaranteed product quality

Guaranteed product quality

We promise all of our products perform as described in datasheets.