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ELK Biotechnology

ELK1685

Human THBS1(Thrombospondin 1) ELISA Kit

Human THBS1(Thrombospondin 1) ELISA Kit

$458.00 USD
$458.00 USD
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Size
Sensitivity
Detection range

Human THBS1(Thrombospondin 1) ELISA Kit

Overview

Product name: Human TSP-1(Thrombospondin-1) ELISA Kit
Reactivity: Human
Alternative Names: TSP1; Thrombospondin-1p180; THBS1; Thrombospondin 1
Assay Type: Sandwich
Sensitivity: 53 pg/mL
Standard: 8000 pg/mL
Detection Range: 125-8000 pg/mL
Sample Type: plasma
Assay Length: 3.5h
Research Area: Infection immunity;Hematology;
Test principle: The test principle applied in this kit is Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Human TSP-1. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human TSP-1. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those wells that contain Human TSP-1, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450nm ± 10nm. The concentration of Human TSP-1 in the samples is then determined by comparing the OD of the samples to the standard curve.

Standard curve

Concentration (ng/mL) OD Corrected OD
8000.00 2.164 2.040
4000.00 1.782 1.658
2000.00 1.205 1.081
1000.00 0.963 0.839
500.00 0.547 0.423
250.00 0.339 0.215
125.00 0.227 0.103
0.00 0.124 0.000

Precision

Intra-assay Precision (Precision within an assay)：CV%<8%

Three samples of known concentration were tested twenty times on one plate to assess intra-assay precision.

Inter-assay Precision (Precision between assays)：CV%<10%

Three samples of known concentration were tested in forty separate assays to assess inter-assay precision.

Recovery

Matrices listed below were spiked with certain level of recombinant TSP-1 and the recovery rates were calculated by comparing the measured value to the expected amount of TSP-1 in samples.
Matrix Recovery range Average
serum(n=5) 85-99% 92%
EDTA plasma(n=5) 93-107% 100%
Heparin plasma(n=5) 87-99% 93%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of TSP-1 and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
Matrix 1:2 1:4 1:8 1:16
serum(n=5) 86-97% 93-105% 82-93% 95-104%
EDTA plasma(n=5) 87-96% 85-97% 85-94% 87-96%
Heparin plasma(n=5) 93-104% 83-96% 95-103% 88-95%
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