• Product name

    Human COMP ELISA Kit
  • Detection method

  • Precision

    Sample n Mean SD CV%
    1 16 1.02ng/ml 0.052 5.1%
    2 16 3.12ng/ml 0.131 4.2%
    3 16 6.19ng/ml 0.254 4.1%
    Sample n Mean SD CV%
    1 24 1.13ng/ml 0.07 6.2%
    2 24 3.08ng/ml 0.166 5.4%
    3 24 6.23ng/ml 0.324 5.2%
  • Sample type

    Cell culture supernatant, Serum, Cell Lysate, Heparin Plasma, EDTA Plasma
  • Assay type

    Sandwich (quantitative)
  • Sensitivity

    < 10 pg/ml
  • Range

    156 pg/ml - 10000 pg/ml
  • Assay time

    3h 30m
  • Assay duration

    Multiple steps standard assay
  • Species reactivity

    Reacts with: Human
  • Product overview

    The Human COMP Enzyme-Linked Immunosorbent Assay (ELISA) kit (ab213764) is designed for the quantitative measurement of Human COMP in cell culture supernatants, cell lysates, tissue homogenates, serum and plasma (heparin, EDTA).

    The ELISA kit is based on standard sandwich enzyme-linked immunosorbent assay technology. A polyclonal antibody from goat specific for COMP has been pre-coated onto 96-well plates. Standards (Expression system for standard: NSO; Immunogen sequence: Q21-A757) and test samples are added to the wells, a biotinylated detection polyclonal antibody from goat specific for COMP is added subsequently and then followed by washing with PBS or TBS buffer. Avidin-Biotin-Peroxidase Complex is added and unbound conjugates are washed away with PBS or TBS buffer. HRP substrate TMB is used to visualize HRP enzymatic reaction. TMB is catalyzed by HRP to produce a blue color product that changed into yellow after adding acidic stop solution. The density of yellow is proportional to the Human COMP amount of sample captured in plate.

  • Notes

    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.

  • Tested applications

    Suitable for: Sandwich ELISAmore details
  • Platform

    Pre-coated microplate (12 x 8 well strips)


  • Storage instructions

    Store at -20°C. Please refer to protocols.
  • Components Identifier 1 x 96 tests
    ABC Diluent Buffer Blue Cap 1 x 12ml
    Adhesive Plate Seal 4 units
    Antibody Diluent Buffer Green Cap 1 x 12ml
    Anti-Human COMP coated Microplate (12 x 8 wells) 1 unit
    Avidin-Biotin-Peroxidase Complex (ABC) 1 x 130µl
    Biotinylated anti- Human COMP antibody 1 x 130µl
    Lyophilized recombinant Human COMP standard 2 vials
    Sample Diluent Buffer Green Cap 1 x 30ml
    TMB Color Developing Agent Black Cap 1 x 10ml
    TMB Stop Solution Yellow Cap 1 x 10ml
  • Research areas

  • Function

    May play a role in the structural integrity of cartilage via its interaction with other extracellular matrix proteins such as the collagens and fibronectin. Can mediate the interaction of chondrocytes with the cartilage extracellular matrix through interaction with cell surface integrin receptors. Could play a role in the pathogenesis of osteoarthritis. Potent suppressor of apoptosis in both primary chondrocytes and transformed cells. Suppresses apoptosis by blocking the activation of caspase-3 and by inducing the IAP family of survival proteins (BIRC3, BIRC2, BIRC5 and XIAP). Essential for maintaining a vascular smooth muscle cells (VSMCs) contractile/differentiated phenotype under physiological and pathological stimuli. Maintains this phenotype of VSMCs by interacting with ITGA7.
  • Tissue specificity

    Abundantly expressed in the chondrocyte extracellular matrix, and is also found in bone, tendon, ligament and synovium and blood vessels. Increased amounts are produced during late stages of osteoarthritis in the area adjacent to the main defect.
  • Involvement in disease

    Defects in COMP are the cause of multiple epiphyseal dysplasia type 1 (EDM1) [MIM:132400]. EDM is a generalized skeletal dysplasia associated with significant morbidity. Joint pain, joint deformity, waddling gait, and short stature are the main clinical signs and symptoms. EDM is broadly categorized into the more severe Fairbank and the milder Ribbing types.
    Defects in COMP are the cause of pseudoachondroplasia (PSACH) [MIM:177170]. PSAC is a dominantly inherited chondrodysplasia characterized by short stature and early-onset osteoarthrosis. PSACH is more severe than EDM1 and is recognized in early childhood.
  • Sequence similarities

    Belongs to the thrombospondin family.
    Contains 4 EGF-like domains.
    Contains 1 TSP C-terminal (TSPC) domain.
    Contains 8 TSP type-3 repeats.
  • Developmental stage

    Present during the earliest stages of limb maturation and is later found in regions where the joints develop.
  • Domain

    The cell attachment motif mediates the attachment to chondrocytes. It mediates the induction of both the IAP family of survival proteins and the antiapoptotic response.
    The TSP C-terminal domain mediates interaction with FN1 and ACAN.
  • Cellular localization

    Secreted > extracellular space > extracellular matrix.
  • Information by UniProt
  • Alternative names

    • Cartilage oligomeric matrix protein
    • cartilage oligomeric matrix protein (pseudoachondroplasia, epiphyseal dysplasia 1, multiple)
    • Cartilage oligomeric matrix protein precursor
    • COMP
    • EDM 1
    • EDM1
    • EPD 1
    • EPD1
    • Epiphyseal dysplasia 1
    • Epiphyseal dysplasia 1 multiple
    • Epiphyseal dysplasia multiple 1
    • MED
    • MGC13181
    • MGC149768
    • PSACH
    • Pseudoachondroplasia
    • pseudoachondroplasia (epiphyseal dysplasia 1, multiple)
    • THBS 5
    • THBS5
    • Thrombospondin 5
    • Thrombospondin-5
    • Thrombospondin5
    • TSP5
    see all
  • Database links


Our Abpromise guarantee covers the use of ab213764 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
Sandwich ELISA Use at an assay dependent concentration.


  • Human COMP ELISA Kit (ab213764) Standard Curve.



ab213764 has not yet been referenced specifically in any publications.

Customer reviews and Q&As

Elisa for COMP in Plasma

Excellent Excellent 5/5 (Ease of Use)
COMP evaluation was performed on Plasma isolated from blood samples to determine OA onset.
Our Samples included: Groups with joint damage, groups with joint damage and walking, and a normal group.
Assay procedure was performed according to manufacturer instructions. We had to dilute our samples according to our BCA results to what the manufacturer suggested. This ended up being 1:100 since the readings were so high. The Elisa kit is very straight forward, with the normal steps. Readings were performed at 450 nm. Photos show the results of standard curve and Test run for the kit.
This kit very simple to use if you have a basic knowledge of an Elisa. Our lab will be using more of these

J Moore

Verified customer

Submitted Jun 06 2019

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