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ELISA Kit for Amyloid Precursor Protein (APP)
AAA; ABeta; ABPP; AD1; APPI; CVAP; PN2; CTFgamma; Peptidase Nexin-II Alzheimer Disease; Peptidase Nexin-II; Amyloid Beta(A4)Precursor Protein
Organism species Homo sapiens (Human)
Product No.SEB020Hu
Sample typeSerum, plasma, cerebrospinal fluid and other biological fluids.
Format96-well strip plate
Assay length4.5 hours
Detection range78.125-5000pg/mL The standard curve concentrations used for the ELISA’s were 5000pg/mL, 2500pg/mL, 1250pg/mL, 625pg/mL, 312.5pg/mL, 156.25pg/mL, 78.125pg/mL
SensitivityThe minimum detectable dose of this kit is typically less than 33pg/mL.
This assay has high sensitivity and excellent specificity for detection of Amyloid Precursor Protein (APP).
No significant cross-reactivity or interference between Amyloid Precursor Protein (APP) and analogues was observed.
Matrices listed below were spiked with certain level of recombinant Amyloid Precursor Protein (APP) and the recovery rates were calculated by comparing the measured value to the expected amount of Amyloid Precursor Protein (APP) in samples.
Matrix Recovery range (%) Average(%)
EDTA plasma(n=5)78-9990
heparin plasma(n=5)94-10197
Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Amyloid Precursor Protein (APP) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Amyloid Precursor Protein (APP) were tested on 3 different plates, 8 replicates in each plate.
CV(%) = SD/meanX100
Intra-Assay: CV<10%
Inter-Assay: CV<12%
The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Amyloid Precursor Protein (APP) 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
EDTA plasma(n=5)78-96%80-97%81-89%89-104%
heparin plasma(n=5)93-103%91-102%82-101%93-101%
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
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 Amyloid Precursor Protein (APP). Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated antibody specific to Amyloid Precursor Protein (APP). 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 Amyloid Precursor Protein (APP), 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 Amyloid Precursor Protein (APP) in the samples is then determined by comparing the O.D. of the samples to the standard curve.
Package and Components
Assay procedure summary
1. Prepare all reagents, samples and
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
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
Reagent Preparation
Results demonstration
Typical Standard Curve
Benchmark price
Neurochemistry International Bilobalide regulates soluble amyloid precursor protein release via phosphatidyl inositol 3 kinase-dependent pathway    Read more(ScienceDirect: S0197018611001641)
Neuroscience Substitution of membrane cholesterol with β-sitosterol promotes nonamyloidogenic cleavage of endogenous amyloid precursor protein    Read more(Pubmed: 23707801)
Catalog No. Related products for research use of Homo sapiens (Human) Organism species Applications
MAB020Hu22Monoclonal Antibody to Amyloid Precursor Protein (APP)WB, ICC, IHC-P, IHC-F, ELISA
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