半胱氨酸蛋白酶抑制剂3(CST3)检测试剂盒说明书

半胱氨酸蛋白酶抑制剂3(CST3)检测试剂盒

适用生物 Homo sapiens (Human，人)
检测范围 1.56-100ng/mL 灵敏度 0.67ng/mL
样本类型 Serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids.
实验时长 4.5h 实验方法 双抗夹心法 
规格 96T
半胱氨酸蛋白酶抑制剂3(CST3)检测试剂盒   ELISA Kit for Cystatin 3 (CST3)
FOR IN VITRO AND RESEARCH USE ONLY, NOT FOR USE IN CLINICAL DIAGNOSTIC PROCEDURES!
Organism species Homo sapiens (Human)
Product No. SEA896Hu
Sample type Serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids.
Format 96-well strip plate
Assay length 4.5 hours
Detection range 1.56-100ng/mL The standard curve concentrations used for the ELISA’s were 100ng/mL, 50ng/mL, 25ng/mL, 12.5ng/mL, 6.25ng/mL, 3.13ng/mL, 1.56ng/mL 
Sensitivity The minimum detectable dose of this kit is typically less than 0.67ng/mL.

半胱氨酸蛋白酶抑制剂3(CST3)检测试剂盒  Specificity
This assay has high sensitivity and excellent specificity for detection of Cystatin 3 (CST3).
No significant cross-reactivity or interference between Cystatin 3 (CST3) and analogues was observed. Recovery
Matrices listed below were spiked with certain level of recombinant Cystatin 3 (CST3) and the recovery rates were calculated by comparing the measured value to the expected amount of Cystatin 3 (CST3) in samples.
Matrix Recovery range (%) Average(%)
serum(n=5) 98-105 102
EDTA plasma(n=5) 92-101 97
heparin plasma(n=5) 79-101 94
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Cystatin 3 (CST3) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Cystatin 3 (CST3) were tested on 3 different plates, 8 replicates in each plate.
CV(%) = SD/meanX100
Intra-Assay: CV<10%
Inter-Assay: CV<12%
半胱氨酸蛋白酶抑制剂3(CST3)检测试剂盒  Linearity
The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Cystatin 3 (CST3) and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
Sample 1:2 1:4 1:8 1:16
serum(n=5) 81-93% 89-101% 93-101% 84-98%
EDTA plasma(n=5) 84-98% 95-105% 93-104% 84-99%
heparin plasma(n=5) 93-101% 98-105% 79-99% 81-99%
Stability
The stability of kit is determined by the loss rate of activity. The loss rate of this kit is less than 5% within the expiration date under appropriate storage condition.
To minimize extra influence on the performance, operation procedures and lab conditions, especially room temperature, air humidity, incubator temperature should be strictly controlled. It is also strongly suggested that the whole assay is performed by the same operator from the beginning to the end. Reagents and materials provided
Reagents Quantity Reagents Quantity
Pre-coated, ready to use 96-well strip plate 1 Plate sealer for 96 wells 4
Standard 2 Standard Diluent 1×20mL
Detection Reagent A 1×120μL Assay Diluent A 1×12mL
Detection Reagent B 1×120μL Assay Diluent B 1×12mL
TMB Substrate 1×9mL Stop Solution 1×6mL
Wash Buffer (30 × concentrate) 1×20mL Instruction manual 1
Assay procedure summary
1. Prepare all reagents, samples and standards;
2. Add 100μL standard or sample to each well. Incubate 2 hours at 37oC;
3. Aspirate and add 100μL prepared Detection Reagent A. Incubate 1 hour at 37oC;
4. Aspirate and wash 3 times;
5. Add 100μL prepared Detection Reagent B. Incubate 30 minutes at 37oC;
6. Aspirate and wash 5 times;
7. Add 90μL Substrate Solution. Incubate 15-25 minutes at 37oC;
8. Add 50μL Stop Solution. Read at 450nm immediately.
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 Cystatin 3 (CST3). Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated antibody specific to Cystatin 3 (CST3). 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 Cystatin 3 (CST3), 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 Cystatin 3 (CST3) in the samples is then determined by comparing the O.D. of the samples to the standard curve.