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Product Info Summary
| SKU: | EK0671 |
|---|---|
| Size: | 96 wells/kit, with removable strips. |
| Reactive Species: | Mouse |
| Application: | ELISA |
| Sample Types: | cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA). |
Product info
Product Name
Mouse Cathepsin B ELISA Kit PicoKine®
View all Cathepsin B ELISA kits
SKU/Catalog Number
EK0671
Size
96 wells/kit, with removable strips.
*Question: How many samples can I assay/run in this kit?
Description
Mouse Cathepsin B ELISA Kit PicoKine® (96 Tests). Quantitate Mouse Ctsb in cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA). Sensitivity: 5pg/ml. The brand Picokine indicates this is a premium quality ELISA kit. Each Picokine kit delivers precise quantification, high sensitivity, and excellent reproducibility. Only our most reliable and effective kits qualify as Picokine, guaranteeing top-tier results for your assays.
Storage & Handling
Store at 4°C for 6 months, at -20°C for 12 months. Avoid multiple freeze-thaw cycles (Ships with gel ice, can store for up to 3 days in room temperature. Freeze upon receiving.)
Cite This Product
Mouse Cathepsin B ELISA Kit PicoKine® (Boster Biological Technology, Pleasanton CA, USA, Catalog # EK0671)
Clonality of Antibodies
See Datasheet for details
Standard Protein
Expression system for standard: NS0; Immunogen sequence: H18-F339
Sensitivity
<5 pg/ml
Assay Range
156 pg/ml - 10,000 pg/ml
Standard Dilution Instructions
See datasheet of EK0671 for more details
Cross-reactivity
There is no detectable cross-reactivity with other relevant proteins.
Reactive Species
EK0671 is reactive to Ctsb in Mouse samples
Validated Sample Types
cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA).
Application Guarantee
EK0671 is guaranteed for ELISA in Mouse by Boster Guarantee
See how Boster Bio validate our ELISA kits: ELISA Validation Information
Background of Cathepsin B
Cathepsin B is an enzymatic protein belonging to the peptidase or protease families. In humans, it is coded by the CTSB gene.1, 2 And this gene is mapped to chromosome 8p22.3 The protein encoded by this gene is a lysosomal cysteine proteinase composed of a dimer of disulfide-linked heavy and light chains, both produced from a single protein precursor. It is a member of the peptidase C1 family. Cathepsin B was once suspected as a candidate protease participating in the conversion of beta-amyloid precursor protein into the amyloid plaques found in Alzheimer's disease patients. However, this function is now known to be mediated by BACE1 protease. It is now thought that cathepsin B can degrade beta-amyloid precursor protein into harmless fragments. Thus, it is conceivable cathepsin B may play a pivotal role in the natural defense against Alzheimer's disease.4 Overexpression of cathepsin B has been associated with esophageal adenocarcinoma and other tumors. At least five transcript variants encoding the same protein have been found for this gene. The standard product used in this kit is recombinant mouse Cathepsin B with the molecular mass of 37KDa.
Kit Components
| Catalog Number | Description | Quantity |
|---|---|---|
| EK0671-CAP | Anti-Mouse Ctsb Pre-coated 96-well strip microplate | 1 |
| EK0671-ST | Mouse Ctsb Standard | 2 vials, 10 ng/tube |
| EK0671-DA | Mouse Ctsb Biotinylated antibody (100x) | 100ul |
| AR1103 | Avidin-Biotin-Peroxidase Complex (100x) | 100ul |
| AR1106-1 | Sample Diluent | 30ml |
| AR1106-2 | Antibody Diluent | 12ml |
| AR1106-3 | Avidin-Biotin-Peroxidase Diluent | 12ml |
| AR1104 | Color Developing Reagent (TMB) | 10ml |
| AR1105 | Stop Solution | 10ml |
| AR1106-5 | Wash Buffer (25x) | 20ml |
| PLA-SEA | Adhesive plate sealers | 4 |
*The kit components are not available for individual purchase.
Materials Required But Not Included In Kit
- Microplate Reader capable of reading absorbance at 450nm.
- Incubator.
- Automated plate washer (optional).
- Pipettes and pipette tips capable of precisely dispensing 0.5 µl through 1 ml volumes of aqueous solutions.
- Multichannel pipettes are recommended for large amount of samples.
- Deionized or distilled water.
- 500ml graduated cylinders.
- Test tubes for dilution.
Data Examples, Quality Control Data & Sample Dilution
Validation Standard Curve O.D. At 450nm
| Concentration (pg/ml) | 0 | 156 | 312 | 625 | 1250 | 2500 | 5000 | 10000 |
| O.D. | 0.014 | 0.102 | 0.170 | 0.293 | 0.532 | 0.800 | 1.301 | 1.929 |
Data Example Images
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Mouse Cathepsin B PicoKine ELISA Kit standard curve
Recommended Sample Dilution Ratios
According to our internal validation assays using this ELISA kit, to detect Cathepsin B, Dilution ratio of 1:5000, concentration in serum and plasma is 5-10 ug/ml..
Some articles we found to cite concentrations of Cathepsin B in samples: 23828190 (Pubmed IDs).
Intra Assay Consistency & Inter Assay Consistency
We measured random samples of Mouse Cathepsin B ELISA Kit PicoKine® within the same batch/lot to ensure the consistency of the kits' performances. ELISA intra assay consistency is measured using wells from the same plate/assay kit. ELISA inter assay consistency is measured using wells from different plates from the same batch production/lot.
| Intra-Assay Precision | Inter-Assay Precision | |||||
|---|---|---|---|---|---|---|
| Sample | 1 | 2 | 3 | 1 | 2 | 3 |
| n | 16 | 16 | 16 | 24 | 24 | 24 |
| Mean (pg/ml) | 242 | 1828 | 4749 | 229 | 1916 | 4534 |
| Standard deviation | 14.76 | 100.54 | 370.42 | 13.96 | 128.37 | 439.79 |
| CV (%) | 6.1% | 5.5% | 7.8% | 6.1% | 6.7% | 9.7% |
Reproducibility
We ensure reproducibility by testing three samples with differing concentrations of Cathepsin B in ELISA kits from four different production batches/lots.
| Lots | Lot 1 (pg/ml) | Lot 2 (pg/ml) | Lot 3 (pg/ml) | Lot 4 (pg/ml) | Mean (pg/ml) | Standard Deviation | CV (%) |
|---|---|---|---|---|---|---|---|
| Sample 1 | 242 | 214 | 229 | 235 | 230 | 10.31 | 4.4% |
| Sample 2 | 1828 | 1771 | 1721 | 1761 | 1770 | 38.23 | 2.1% |
| Sample 3 | 4749 | 4980 | 5227 | 4633 | 4897 | 227.69 | 4.6% |
Protein Target Info & Infographic
Gene/Protein Information For Ctsb (Source: Uniprot.Org, NCBI)
Gene Name
Ctsb
Full Name
Cathepsin B
Weight
37280 MW
Superfamily
peptidase C1 family
Alternative Names
Cathepsin B;3.4.22.1;Cathepsin B1;Cathepsin B light chain;Cathepsin B heavy chain;Ctsb; CTSB APPS, CPSB, RECEUP cathepsin B cathepsin B|APP secretase|amyloid precursor protein secretase|cathepsin B1|cysteine protease|epididymis secretory sperm binding protein
*if product is indicated to react with multiple species, protein info is based on the gene entry specified above in "species".For more info on Ctsb, check out the Ctsb Infographic
We have 30,000+ of these available, one for each gene! check them out.
In this infographic you will see the following information for Ctsb: database IDs, super-family, protein function, synonyms, molecular weight, chromosomal locations, tissues of expression, subcellular locations, post translational modifications, and related diseases, research areas & pathways. If you want to see more information included, or would like to contribute to it and be acknowledged, please contact us [email protected].
Specific Publications For Mouse Cathepsin B ELISA Kit PicoKine® (EK0671)
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Customer Reviews
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Customer Q&As
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11 Customer Q&As for Mouse Cathepsin B ELISA Kit PicoKine®
Question
Q: we need your suggestion regarding the dilution ratio of serum samples for detection of Cathepsin B in Mouse serum? I am trying to measure a a number of analytes and it requires 100ul of diluted samples for each well. We have limited sample quantitys so we like to dilute as much as possible.
W. Kaur
Verified customer
Asked: 2020-01-05
Answer
A: having little idea about the physiological or pathological context of your samples we cannot recommend a dilution ratio without performing a pilot test with your samples. Here is how you can perform a pilot study on your own: perform a serial dilution of your samples on the Cathepsin B ELISA kit to make sure you have a linear ascending curve followed by a plateau, which signifies the samples saturating the detection limit of the kit. Then you can pick the dilution ratios from samples in the linear part of the curve as your experimental dilution ratio.
If you are interested in using our ELISA service, you can also send us your sample and we will take care of everything for you. You can check our service details here: bosterbio.com/services/assay-services/ELISA-testing-service
Since you mentioned you have limited samples, our cost effective multiplex ELISA service would fit perfectly for your needs, where we can generate dozens of data points using as little as 25ul sample volume. Information on this service is also in the above link.
Boster Scientific Support
Answered: 2020-01-05
Question
Q: how are cell lysates prepared for use in Picokine® ELISA kits?
Verified Customer
Verified customer
Asked: 2019-07-28
Answer
A: for those Picokine® ELISAs where cell or tissue lysate is a validated sample type, sample preparation instructions for lysate are included in the product insert. Components in lysate and lysis buffer can change immunoreactivity, so if lysate is not a validated sample type, care must be taken in sample preparation and validation.
Boster Scientific Support
Answered: 2019-07-28
Question
Q: which procedure should I follow in order to thaw whole blood sample for Cathepsin B ELISA after freezing?
Verified Customer
Verified customer
Asked: 2019-07-07
Answer
A: we do not recommend freezing and thaw whole blood. erythrocytes are fragile and, if frozen and thawed, will undergo hemolysis rendering the samples useless. To keep your blood samples to test Cathepsin B for a later time, you should let the blood clot in glass tubes and collect the serum to freeze for later use.
Boster Scientific Support
Answered: 2019-07-07
Question
In your protocol why is there no wash step between the addition of samples/standards and the addition of the biotinylated anti Mouse Cathepsin B antibody? Keyword: troubleshooting, procedure
Verified Customer
Verified customer
Asked: 2019-07-05
Answer
The wash step aims to wipe off some saturated substances, but when add quantitative samples/standards, the reagent is in an unsaturated condition, it doesn't have excess materials, so it has slight significance to wash it. The wash step will not much affect the experiment result.
Boster Scientific Support
Answered: 2019-07-05
Question
Q: What is the optimal O.D. value for Cathepsin B ELISA kit? I used your Cathepsin B ELISA on serum samples. For my positive control, I received an O.D. value of 0.826, while my negative control received a value of 0.136. I obtained both of these controls from the ELISA kit, where your kit's typical data shows O.D. values much higher than my positive control and your background is lower. My samples O.D. values are around 0.225 and the highest is only 0.357. is it safe to say these samples contain Cathepsin B even though the O.D. values are not very high?
Verified Customer
Verified customer
Asked: 2019-02-16
Answer
A: The absolute O.D. values may change according to incubation time. The more you incubate the higher the O.D. values are going to be. an important assessment should be is whether your sample O.D. values are statistically significantly higher than your blank values. considering your assay, you could extend your development time in the substrate incubation step to obtain higher O.D. values, as long as your negative controls' O.D. values are not increasing faster in relation to your positive controls. typically, a sample with O.D. value 2 standard deviations higher than your negative controls can be considered positive. We calculate the sensitivity of this ELISA kit by converting cutoff O.D. value, calculated as the average of 20 negative controls plus 2 standard deviations of the 20 negative controls, into a concentration. in other words, when we claim this Cathepsin B ELISA kit to have sensitivity of 5pg/ml, that means the minimum amount of Cathepsin B that can be declared/interpreted as positive by the above standard is 5pg/ml.
Boster Scientific Support
Answered: 2019-02-16
Question
Q: Are Boster Bio recombinant proteins and antibodies sterile?
J. Kapoor
Verified customer
Asked: 2018-08-21
Answer
A: although the vials are bottled using aseptic techniques, heat-treated vials, and sterile stock solutions, they are not considered or guaranteed to be sterile. If sterile material is needed for an experiment, the material can be filtered through a 0.2 micron filter designed for use with biological fluids.
Boster Scientific Support
Answered: 2018-08-21
Question
Q: if the enzyme conjugated Cathepsin B antibodies are mixed with the substrate, will that convert the substrate into the enzymatic reaction product? Or the enzyme function is only activated when the antibody is attached with the Cathepsin B antigen?
Verified Customer
Verified customer
Asked: 2017-03-02
Answer
A: The enzyme is always active. Avoid contaminating the substrate with enzyme prior to the incubation otherwise it compromises the assay with false positive signal.
Boster Scientific Support
Answered: 2017-03-02
Question
Q: Can Cathepsin B ELISA Kits be used with tissue homogenates (or other non-validated sample types)?
Verified Customer
Verified customer
Asked: 2017-02-08
Answer
A: Unfortunately, Boster Bio has not routinely validated tissue homogenates as a sample type for ELISA kits. This does not mean that ELISA kits are not suitable for other sample types than we have tested: it means further investigation is required. One will need to perform a spike and recovery study to determine if an unvalidated sample type will work with a particular kit. To perform a spike and recovery experiment, one should divide a sample into two aliquots. In one of the aliquots, the user should spike in a known amount of the kit standard. a dilution series is performed comparing the spiked versus the unspiked sample. Generally, samples with expected recovery and linearity between 80-120% are considered acceptable. This method can be used to validate any sample type that has not been evaluated by Boster Bio. for a more detailed spike and recovery protocol, please contact technical support.
Note: acceptable ranges should be determined individually by each laboratory. Additionally, technical support can help determine if a buffer component is not compatible with a given ELISA kit. please view the Citations tab on the product webpage for peer-reviewed papers utilizing a wide range of sample types. We also have an innovator's reward program where if the user validates our ELISA kits in applications or samples previously not validated by Boster Bio or other users, and share such information with us by submit a review, we will reward the user's efforts with a free antibody or ELISA kit from our catalog. Biocompare.com will also give $20 Amazon giftcard as an additional reward, if the review is submitted there as well.
Boster Scientific Support
Answered: 2017-02-08
Question
Q: for how much duration can samples (cell cultures, serum, and plasma) be stored and still be stable for measuring Cathepsin B using the EK0671 Mouse Cathepsin B Picokine® ELISA Kit?
Verified Customer
Verified customer
Asked: 2016-09-29
Answer
A: Boster Bio does not assess sample stability. Variations in sample collection, processing, and storage may alter the stabilityof samples. It is recommend to assay sample on priority basis collection when possible, or aliquot into single use volumes and store samples frozen. limit repetitive freeze-thaw cycles with the stored samples in order to prevent protein degradation.
Boster Scientific Support
Answered: 2016-09-29
Question
Q: is there any online tool I can use to streamline the data analysis for my ELISA results?
A. Harris
Verified customer
Asked: 2016-03-25
Answer
A: We have a web based ELISA curve fitting (4pl) and data analysis tool. Please give it a try: bosterbio.com/biology-research-tools/ELISA-data-analysis-online. You can also consult our article on ELISA data analysis: bosterbio.com/ELISA-data-analysis-instructions
Boster Scientific Support
Answered: 2016-03-25
Question
Does your standard in this kit made of recombinant protein from the insect cell systems such as Baculovirus?
Verified Customer
Verified customer
Asked: 2013-06-18
Answer
All of our ELISA standards are made from either mammalian, bacterial or fungal expression system. Specifically, the cell line used to make the mouse Cathepsin B standard is NSO cells which are mammalian.
Boster Scientific Support
Answered: 2013-06-18
