CSTB ELISA kit (Human)

SKU: SEJ322Hu

Size: 96Tests

# of Times Cited in literature: 8

Prepare Time: 2-7 days(please inquire for mutiple units)

Target Name: CSTB

Target Full Name: Cystatin B

Alternative Names: Cys-B; CST6; EPM1; PME; STFB; CPI-B; Stefin B; Liver thiol proteinase inhibitor

Target Species: Human

Uniprot: P04080

Gene ID: 1476

Featured Series: SE kit

Featured Series Function: Detects protein (regular version)

Specificity: Reactive with Human CSTB / Cystatin B

Method: Colormetric

Detection principle: Double-antibody Sandwich

Detection range: 0.312-20ng/mL

Sensitivity: 0.116ng/mL

Assay Time: 3h

Sample Size: 100uL

Recommended/Predicted Sample Types: Serum, Plasma, Tissue Homogenates, Cell Lysates, Cell Culture Supernates and other Biological Fluids

Assay Precision: Intra-Assay: CV<10%, Inter-Assay: CV<12%

Reproducibility test menthod: Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Cystatin B (CSTB) were tested 20 times on one plate, respectively. Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Cystatin B (CSTB) were tested on 3 different plates, 8 replicates in each plate. CV(%) = SD/meanX100

Storage: 4°C for 1 month/ -20°C for long-term(One year within shelf life)

Shelf-life: 12 months

Specificity: This assay has high sensitivity and excellent specificity for detection of Cystatin B (CSTB). No significant cross-reactivity or interference between Cystatin B (CSTB) and analogues was observed.

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.

Assay procedure summary: 1. Prepare all reagents, samples and standards; 2. Add 100µL standard or sample to each well. Incubate 1 hours at 37°C; 3. Aspirate and add 100µL prepared Detection Reagent A. Incubate 1 hour at 37°C; 4. Aspirate and wash 3 times; 5. Add 100µL prepared Detection Reagent B. Incubate 30 minutes at 37°C; 6. Aspirate and wash 5 times; 7. Add 90µL Substrate Solution. Incubate 10-20 minutes at 37°C; 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 B (CSTB). Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated antibody specific to Cystatin B (CSTB). 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 B (CSTB), 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 B (CSTB) in the samples is then determined by comparing the O.D. of the samples to the standard curve.

Research Area: Immune molecule;

References Citing This Product: Cathepsin B and cystatin B in HIV-seropositive women are associated with infection and HIV-1-associated neurocognitive disorders

Evaluation of serum procathepsin B, cystatin B and cystatin C as possible biomarkers of ovarian cancer

Dysregulation of Macrophage-Secreted Cathepsin B Contributes to HIV-1-Linked Neuronal Apoptosis

Cocaine potentiates cathepsin B secretion and neuronal apoptosis from HIV-infected macrophages

A91: Endogenous inhibitors of cysteine proteases and preform of cathepsin B in cancer of reproductive system

Diagnostic specificity and sensitivity of PIVKAII, GP3, CSTB, SCCA1 and HGF for the diagnosis of hepatocellular carcinoma in patients with alcoholic liver cirrhosis.