Human ELISA Kits

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Product Details
Product Name in English:
Human SERPINA4(Kallistatin) ELISA Kit
Species:
Human
Alternative Name:
SERPINA4, KAL, KLST, KST, PI-4, PI4, kallistatin, serpin family A member 4, Peptidase inhibitor 4, Serpin A4, Kallikrein inhibitor,
Uniport ID:
P29622
Assay Type:
Sandwich
Standard:
1000ng/mL
Sensitivity:
9.38 ng/mL
Detection Range:
15.63-1000ng/mL
Assay Time:
3.5H
Sample Type:
Serum, Plasma, Tissue homogenate and Other biological samples
Research:
Enzyme & Kinase;
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 SERPINA4. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to SERPINA4. 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 SERPINA4, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of stop solution and the color change is measured spectrophotometrically at a wavelength of 450nm ± 10nm. The concentration of SERPINA4 in the samples is then determined by comparing the OD of the samples to the standard curve.
Technical Data
As the OD values of the standard curve may vary according to the conditions of the actual assay performance (e.g. operator, pipetting technique, washing technique or temperature effects), the operator should establish a standard curve for each test. Typical standard curve and data is provided below for reference only.
Concentration OD1 OD2 Average OD Corrected
1000 2.475 2.476 2.476 2.43
500 1.595 1.598 1.597 1.55
250 0.902 0.902 0.902 0.857
125 0.467 0.471 0.469 0.422
62.5 0.258 0.259 0.259 0.213
31.25 0.152 0.152 0.152 0.107
15.63 0.101 0.102 0.102 0.056
0 0.045 0.045 0.045 0
Linear
Samples were spiked with high concentrations of target proteins and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.
Serum (n=5) EDTA plasma (n=5) Cell culture media (n=5)
1:2 Range (%) 92-101 86-101 92-105
Average (%) 98 92 101
1:4 Range (%) 82-98 86-101 86-93
Average (%) 89 89 91
1:8 Range (%) 89-97 86-101 91-101
Average (%) 91 89 92
1:16 Range (%) 85-93 87-96 87-98
Average (%) 89 94 97
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level were tested 20 times on one plate, respectively. Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level were tested on 3 different plates, 20 replicates in each plate, respectively.
Item Intra-assay Precision Intra-assay Precision
Sample 3 3
Replicate 9 18
CV(%) 5 8
Rate of recovery
The recovery of 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) 93-107 100
EDTA plasma (n=8) 87-99 93
Cell culture media (n=8) 92-107 99
Assay Procedures
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