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Human Thrombospondin-2 Quantikine ELISA Kit

R&D Systems | Catalog # DTSP20

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Key Product Details

Assay Length

4.5 hours

Sample Type & Volume Required Per Well

Cell Culture Supernates (50 µL), Serum (13 µL), EDTA Plasma (13 µL), Heparin Plasma (13 µL), Human Milk (50 µL)

Sensitivity

0.068 ng/mL

Assay Range

0.31-20 ng/mL (Cell Culture Supernates, Serum, EDTA Plasma, Heparin Plasma, Human Milk)
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Product Summary for Human Thrombospondin-2 Quantikine ELISA Kit

The Quantikine Human Thrombospondin-2 Immunoassay is a 4.5 hour solid-phase ELISA designed to measure human Thrombospondin-2 in cell culture supernates, serum, plasma, and human milk. It contains NS0-expressed recombinant human Thrombospondin-2 and has been shown to accurately quantitate the recombinant factor. Results obtained using natural human Thrombospondin-2 showed linear curves that were parallel to the standard curves obtained using the Quantikine kit standards. These results indicate that this kit can be used to determine relative mass values for naturally occurring human Thrombospondin-2.

Product Specifications

Assay Type

Solid Phase Sandwich ELISA

Format

96-well strip plate

Measurement

Quantitative ELISA

Detection Method

Colorimetric - 450nm (TMB)

Conjugate

HRP

Species

Human

Specificity

Natural and recombinant human Thrombospondin-2

Cross-reactivity

Cross-reactivity observed with 1 or more available related molecules. Cross-species reactivity not tested.

Interference

No significant interference observed with available related molecules.

Precision

Intra-Assay Precision (Precision within an assay) Three samples of known concentration were tested on one plate to assess intra-assay precision.

Inter-Assay Precision (Precision between assays) Three samples of known concentration were tested in separate assays to assess inter-assay precision.

Cell Culture Supernates

Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 40 40 40
Mean (ng/mL) 4.08 7.73 10.9 4.11 7.71 11.4
Standard Deviation 0.189 0.229 0.281 0.295 0.511 0.726
CV% 4.6 3.0 2.6 7.2 6.6 6.4

EDTA Plasma, Heparin Plasma, Human Milk, Serum

Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 40 40 40
Mean (ng/mL) 3.97 7.96 11.4 4.12 7.68 11.4
Standard Deviation 0.198 0.205 0.284 0.259 0.403 0.527
CV% 5.0 2.6 2.5 6.3 5.2 4.6

Recovery for Human Thrombospondin-2 Quantikine ELISA Kit

The recovery of Thrombospondin-2 spiked to levels throughout the range of the assay in various matrices was evaluated.

Sample Type Average % Recovery Range %
Cell Culture Media (n=4) 101 91-108
EDTA Plasma (n=4) 93 86-105
Heparin Plasma (n=4) 92 86-103
Serum (n=4) 93 86-105

Linearity

To assess the linearity of the assay, samples containing and/or spiked with high concentrations of Thrombospondin-2 were serially diluted with the appropriate Calibrator Diluent to produce samples with values within the dynamic range of the assay.

Human Thrombospondin-2 ELISA Linearity

Scientific Data Images for Human Thrombospondin-2 Quantikine ELISA Kit

Human Thrombospondin-2 ELISA Cell Culture Supernate Standard Curve

Human Thrombospondin-2 ELISA Cell Culture Supernate Standard Curve

Human Thrombospondin-2 ELISA Serum/Plasma/Human Milk Standard Curve

Human Thrombospondin-2 ELISA Serum/Plasma/Human Milk Standard Curve

Preparation and Storage

Shipping

The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: Thrombospondin-2

Thrombospondins (TSP) are secreted multidomain glycoproteins with many putative functions including modulating cell adhesion, proliferation, migration, and angiogenesis. At least five TSPs exist: TSP-1, -2, -3, -4, and cartilage oligomeric glycoprotein (COMP)/TSP-5. The family can be divided into two subgroups. The first, TSP-1 and -2, are homotrimeric molecules, each monomer containing an N-terminal/heparin-binding domain, a coiled-coil oligomerization domain, a von Willebrand factor-type/procollagen homology domain, three type 1 thrombospondin repeats (TSR), three EGF-like repeats, seven TSP type 3 repeats, and a C-terminal globular domain. TSP-1 and -2 are thought to mediate interactions between cells and the extracellular matrix, and as such are matricellular proteins. In contrast, TSP-3, -4, and COMP/TSP-5 are homopentamers that lack the N-terminal structure of TSP-1 and -2, but have a similar arrangement of EGF and TSP type 3 repeats, and the C-terminal domain characteristic of the TSP family.

Alternate Names

THBS2, Thrombospondin2, TSP-2

Entrez Gene IDs

7058 (Human)

Gene Symbol

THBS2

Additional Thrombospondin-2 Products

Product Documents for Human Thrombospondin-2 Quantikine ELISA Kit

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot or batch number in the search box below.

Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Human Thrombospondin-2 Quantikine ELISA Kit

For research use only

⚠ WARNING: This product can expose you to chemicals including N,N-Dimethylforamide, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.

Citations for Human Thrombospondin-2 Quantikine ELISA Kit

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Protocols

View specific protocols for Human Thrombospondin-2 Quantikine ELISA Kit (DTSP20):

Refer to the product for complete assay procedure.

Bring all reagents and samples to room temperature before use. It is recommended that all samples, standards, and controls be assayed in duplicate.
  1.   Prepare all reagents, standard dilutions, and samples as directed in the product insert.
  2.   Remove excess microplate strips from the plate frame, return them to the foil pouch containing the desiccant pack, and reseal.
    3. 100 µL Assay Diluent
  3.   Add 100 µL of Assay Diluent to each well.
    4. 50 µL Standard, Control, or Sample
  4.   Add 50 µL of Standard, control, or sample to each well. Cover with a plate sealer, and incubate at room temperature for 2 hours on a horizontal orbital microplate shaker.
  5.   Aspirate each well and wash, repeating the process 3 times for a total of 4 washes.
    6. 200 µL Conjugate
  6.   Add 200 µL of Conjugate to each well. Cover with a new plate sealer, and incubate at room temperature for 2 hours on the shaker.
  7.   Aspirate and wash 4 times.
    8. 200 µL Substrate Solution
  8.   Add 200 µL Substrate Solution to each well. Incubate at room temperature for 30 minutes on the benchtop. PROTECT FROM LIGHT.
    9. 50 µL Stop Solution
  9.   Add 50 µL of Stop Solution to each well. Read at 450 nm within 30 minutes. Set wavelength correction to 540 nm or 570 nm.

Find general support by application which include: protocols, troubleshooting, illustrated assays, videos and webinars.

FAQs for Human Thrombospondin-2 Quantikine ELISA Kit

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  • Q: What is the normal appearance of Assay Diluent RD1-75?

    A: Assay Diluent RD1-75 contains high concentrations of additives and typically has a very cloudy, brown appearance. It is recommended to mix this diluent well before and during use.

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Associated Pathways

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