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Product Info Summary
| SKU: | EK1502 |
|---|---|
| Size: | 96 wells/kit, with removable strips. |
| Reactive Species: | Human |
| Application: | ELISA |
| Sample Types: | cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA). |
Product info
Product Name
Human TAFI/CPB2/Carboxypeptidase B2 ELISA Kit PicoKine®
View all Carboxypeptidase B2/CPB2 ELISA kits
SKU/Catalog Number
EK1502
Size
96 wells/kit, with removable strips.
*Question: How many samples can I assay/run in this kit?
Description
Human TAFI/CPB2 ELISA Kit PicoKine® (96 Tests). Quantitate Human CPB2 in cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA). Sensitivity: 15pg/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
Human TAFI/CPB2/Carboxypeptidase B2 ELISA Kit PicoKine® (Boster Biological Technology, Pleasanton CA, USA, Catalog # EK1502)
Clonality of Antibodies
See Datasheet for details
Standard Protein
Expression system for standard: NS0; Immunogen sequence: M1-V423
Sensitivity
<15 pg/ml
Assay Range
156 pg/ml - 10,000 pg/ml
Standard Dilution Instructions
See datasheet of EK1502 for more details
Cross-reactivity
There is no detectable cross-reactivity with other relevant proteins.
Reactive Species
EK1502 is reactive to CPB2 in Human samples
Validated Sample Types
cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA).
Application Guarantee
EK1502 is guaranteed for ELISA in Human by Boster Guarantee
See how Boster Bio validate our ELISA kits: ELISA Validation Information
Background of Carboxypeptidase B2/CPB2
Carboxypeptidase B2 (CPB2), also known as carboxypeptidase U (CPU), plasma carboxypeptidase B (pCPB) or thrombin-activatable fibrinolysis inhibitor (TAFI), is an enzyme that, in humans, is encoded by the gene CPB2. CPB2 is synthesized by the liver and circulates in the plasma as a plasminogen-bound zymogen. When it is activated by proteolysis at residue Arg92 by the thrombin/thrombomodulin complex, CPB2 exhibits carboxypeptidase activity. Activated CPB2 reduces fibrinolysis by removing the fibrin C-terminal residues that are important for the binding and activation of plasminogen.
Kit Components
| Catalog Number | Description | Quantity |
|---|---|---|
| EK1502-CAP | Anti-Human CPB2 Pre-coated 96-well strip microplate | 1 |
| EK1502-ST | Human CPB2 Standard | 2 vials, 10 ng/tube |
| EK1502-DA | Human CPB2 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. | 0.028 | 0.227 | 0.410 | 0.695 | 1.266 | 1.553 | 1.727 | 2.029 |
Data Example Images
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Human TAFI/CPB2 PicoKine ELISA Kit standard curve
Recommended Sample Dilution Ratios
According to our internal validation assays using this ELISA kit, to detect Carboxypeptidase B2/CPB2, Dilution ratio of 1:2000, concentration in serum and plasma is 1.3-3 ug/ml..
Intra Assay Consistency & Inter Assay Consistency
We measured random samples of Human TAFI/CPB2/Carboxypeptidase B2 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) | 234 | 1109 | 4549 | 248 | 1155 | 4773 |
| Standard deviation | 17.08 | 58.77 | 209.25 | 21.32 | 64.68 | 229.1 |
| CV (%) | 7.3% | 5.3% | 4.6% | 8.6% | 5.6% | 4.8% |
Reproducibility
We ensure reproducibility by testing three samples with differing concentrations of Carboxypeptidase B2/CPB2 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 | 234 | 245 | 212 | 225 | 229 | 12.1 | 5.2% |
| Sample 2 | 1109 | 1258 | 1141 | 1184 | 1173 | 55.82 | 4.7% |
| Sample 3 | 4549 | 4286 | 4769 | 4692 | 4574 | 184.06 | 4% |
Protein Target Info & Infographic
Gene/Protein Information For CPB2 (Source: Uniprot.Org, NCBI)
Gene Name
CPB2
Full Name
Carboxypeptidase B2
Weight
48424 MW
Superfamily
peptidase M14 family
Alternative Names
Carboxypeptidase B2;3.4.17.20 ;Carboxypeptidase U;CPU;Plasma carboxypeptidase B;pCPB;Thrombin-activable fibrinolysis inhibitor;TAFI;CPB2; CPB2 CPU, PCPB, TAFI carboxypeptidase B2 carboxypeptidase B2|carboxypeptidase B-like protein|carboxypeptidase B2 (plasma)|carboxypeptidase B2 (plasma, carboxypeptidase U)|carboxypeptidase R|thrombin-activable fibrinolysis inhibitor|thrombin-activatable fibrinolysis inhibitor
*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 CPB2, check out the CPB2 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 CPB2: 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 Human TAFI/CPB2/Carboxypeptidase B2 ELISA Kit PicoKine® (EK1502)
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No publications found for EK1502
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Customer Reviews
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Customer Q&As
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Find answers in Q&As, reviews.
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11 Customer Q&As for Human TAFI/CPB2/Carboxypeptidase B2 ELISA Kit PicoKine®
Question
Q: how can I thaw whole blood sample for Carboxypeptidase B2 ELISA after freezing?
P. Bhasin
Verified customer
Asked: 2020-12-03
Answer
A: do not freeze 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 Carboxypeptidase B2 for a later time, you should let the blood clot in glass tubes and separate the serum to freeze for later analysis.
Boster Scientific Support
Answered: 2020-12-03
Question
Q: how do I analyze ELISA data? I have obtained Carboxypeptidase B2 level in cell lysates.
B. Adams
Verified customer
Asked: 2020-06-17
Answer
A: please read this article on ELISA data analysis. bosterbio.com/ELISA-data-analysis-instructions. we also provide a convenient online tool that you can use to analyze ELISA data. bosterbio.com/biology-research-tools/ELISA-data-analysis-online
Boster Scientific Support
Answered: 2020-06-17
Question
Q: Are Boster Bio recombinant proteins and antibodies sterile?
Verified Customer
Verified customer
Asked: 2020-06-08
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 a must for an experiment, the material can be filtered through a 0.2 micron filter designed for use with biological fluids.
Boster Scientific Support
Answered: 2020-06-08
Question
Must control be set when using EK1502?
Verified customer
Asked: 2020-01-15
Answer
Fo the Human TAFI/CPB2 ELISA Kit PicoKine™ (EK1502), it is recommended that control be set. Running the appropriate controls helps you to accurately separate true positive results from potentially false results.
Boster Scientific Support
Answered: 2020-01-16
Question
Q: can I use citrate plasma as samples in Human Carboxypeptidase B2 Picokine® ELISA Kit (Catalog # EK1502)?
Verified Customer
Verified customer
Asked: 2019-06-28
Answer
A: Chelating agents such as EDTA, Heparin and Citrate can attach metal ions from the functional domain of Carboxypeptidase B2 causing disruption of its protein structure. Carboxypeptidase B2 may be denatured as a result and may compromise the assay's measurements. The chilating sites could also be too close to the epitopes a must for detection and block the antigen antibody reaction. We have tested the Carboxypeptidase B2 ELISA, treating samples with different anticoagulants and decided that heparin or EDTA can be used for treatment of blood/plasma samples. Do not use other anticoagulents when collecting samples.
Boster Scientific Support
Answered: 2019-06-28
Question
Q: for how much duration can samples (cell cultures, serum, and plasma) be stored and still be stable for analysis Carboxypeptidase B2 using the EK1502 Human Carboxypeptidase B2 Picokine® ELISA Kit?
D. Kulkarni
Verified customer
Asked: 2019-05-18
Answer
A: Boster Bio does not assess sample stability. Variations in sample collection, processing, and storage may change the stabilityof samples. It is recommend to assay sample right after collection when possible, or aliquot into single use volumes and store samples frozen. avoid repetitive freeze-thaw cycles with the stored samples to avoid protein degradation.
Boster Scientific Support
Answered: 2019-05-18
Question
Q: if the enzyme conjugated Carboxypeptidase B2 antibodies are mixed with the substrate, will that change the substrate into the enzymatic reaction product? Or the enzyme function is only activated when the antibody is attached with the Carboxypeptidase B2 antigen?
Verified Customer
Verified customer
Asked: 2019-01-01
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: 2019-01-01
Question
Q: can you suggest the dilution ratio of serum samples for detection of Carboxypeptidase B2 in Human cell lysates? I am trying to measure a few analytes and it requires 100ul of diluted samples for each well. We have low serum volumes so we like to dilute as much as possible.
Verified Customer
Verified customer
Asked: 2015-07-02
Answer
A: without knowing 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 Carboxypeptidase B2 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: 2015-07-02
Question
Q: what is the protocol regarding preparation of cell lysates prepared for use in Picokine® ELISA kits?
R. Puri
Verified customer
Asked: 2014-12-11
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 have an affect on immunoreactivity, so if lysate is not a validated sample type, care must be taken in sample preparation and validation.
Boster Scientific Support
Answered: 2014-12-11
Question
Q: Can Carboxypeptidase B2 ELISA Kits be used with tissue homogenates (or other non-validated sample types)?
Verified Customer
Verified customer
Asked: 2014-08-21
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 valid for other sample types than we have tested: it means further investigation is needed. 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: 2014-08-21
Question
Q: is there any online tool I can use to streamline the data analysis for my ELISA results?
Verified Customer
Verified customer
Asked: 2014-01-03
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: 2014-01-03
