- Regulatory Status
- RUO
- Other Names
- Carbonic anhydrase 9, Carbonate dehydratase IXCA9, CAIX, CA-IX, ,Carbonic Anhydrase IX, carbonic dehydratase, EC 4.2.1.1, G250,Membrane antigen MN, MN, P54/58N, PMW1, RCC, RCC-associatedantigen G250, RCC-associated protein G250
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- Product Citations
- publications
![Anhydrase-9_Human_Recom_BA_1_062623 Anhydrase-9_Human_Recom_BA_1_062623](https://d1spbj2x7qk4bg.cloudfront.net/Admin/Public/GetImage.ashx?Image=/Files/Images/media_assets/products/product_images/Anhydrase-9_Human_Recom_BA_1_062623.png&Width=240&Height=300&altFmImage_path=&Compression=90&Crop=5)
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The activity of human CA9 was measured with 2 mM of fluorogenic substrate, 4-nitrophenol acetate, in the presence of 0.03125, 0.0625, 0.125, 0.25, 0.5, 1, 2 µg of hCA9. The SA > 20 pmole/min/µg. -
CA9 was aliquoted in 25 mM Tris, 150 mM NaCl, pH 7.5 at 0.2 mg/mL and one aliquot was kept at 4°C (Control), and another was frozen and thawed four times (4x Freeze/Thaw). The samples were tested by their ability to catalyze the hydrolysis of 4-nitrophnel acetate. The SA >20 pmole/min/µg.
Cat # | Size | Price | Quantity Check Availability | Save | ||
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561604 | 25 µg | 316€ | ||||
561606 | 100 µg | 632€ |
Carbonic anhydrases (CAs) are a large family of zinc metalloenzymes that catalyze the reversible hydration of carbon dioxide (H2O + CO2 = H+ + HCO3-). They participate in a variety of biological and physical processes. CA9, also known as membrane antigen, and G250, a renal cell carcinoma (RCC)-associated antigen, are transmembrane enzymes expressed primarily in clear cell renal cell carcinoma. No expression has been detected in normal cells including kidney cells. In addition, CA9 and G250 might be involved in cell proliferation and transformation. CA9 is used as a marker of tumor hypoxia and as a new therapeutic target for many human carcinomas and cancers. CA9 participate in a variety of biological processes, including respiration, calcification, acid-base balance, bone resorption and the formation of aqueous humor, cerebrospinal fluid, saliva, and gastric acid.
Product DetailsProduct Details
- Source
- Recombinant human CA9, amino acid Pro59-Asp414 (Accession No. Q16790) was expressed in CHO cells.
- Molecular Mass
- The 365 amino acid recombinant protein has a predicted molecular mass of approximately 42.5 kD. The DTT-reduced protein migrates at approximately 50 kD and non-reduced protein migrates at approximately 100 kD by SDS-PAGE.
- Purity
- > 95%, as determined by Coomassie stained SDS-PAGE.
- Formulation
- 0.22 µm filtered protein solution is in 25mM Tris, 150mM NaCl, pH 7.5
- Endotoxin Level
- Less than 0.1 EU per µg cytokine as determined by the LAL method.
- Concentration
- 25 µg size is bottled at 200 µg/mL. 100 µg size and larger sizes are lot-specific and bottled at the concentration indicated on the vial. To obtain lot-specific concentration and expiration, please enter the lot number in our Certificate of Analysis online tool.
- Storage & Handling
- Unopened vial can be stored between 2°C and 8°C for up to 2 weeks, at -20°C for up to six months, or at -70°C or colder until the expiration date. For maximum results, quick spin vial prior to opening. The protein can be aliquoted and stored at -20°C or colder. Stock solutions can also be prepared at 50 - 100 µg/mL in appropriate sterile buffer, carrier protein such as 0.2 - 1% BSA or HSA can be added when preparing the stock solution. Aliquots can be stored between 2°C and 8°C for up to one week and stored at -20°C or colder for up to 3 months. Avoid repeated freeze/thaw cycles.
- Activity
- The esterase activity of CA9 is used to measure its specific activity (SA). The SA is > 20 pmole/min/µg, at an absorbance of 400 nm with 2 mM of enzymatic substrate (4-Nitrophenyl acetate) and 2 µg enzyme in 50 µL of 12.5 mM Tris, 75 mM NaCl, pH 7.5.
- Application
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Bioassay
- Application Notes
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The esterase activity of Human Carbonic Anhydrase 9 (hCA9) activity is used to measure its specific activity (SA). The SA is > 20 pmole/min/μg, at an absorbance of 400 nm with 2 mM of enzymatic substrate (4-Nitrophenyl acetate) and 2 μg enzyme in 50 μL of 12.5 mM Tris, 75 mM NaCl, pH 7.5. The increase of the product is monitored by increase in intensity of fluorescence at 400 nm.
Materials1. Assay Buffer: 12.5 mM Tris, 75 mM NaCl, pH 7.52. Recombinant Human Carbonic Anhydrase 93. 2 mM of enzymatic substrate (4-Nitrophenyl acetate) and 2 μg enzyme in 50 μL of 12.5 mM Tris, 75 mM NaCl, pH 7.5.4. 4-NitrophenolActivity assay procedures1. Prepare hCA9 to 40 μg/mL in Assay Buffer2. Dilute 4-Nitrophenol to 0.4 mM in assay buffer.3. Add 100 µL of the 0.4 mM 4-Nitrophenol or 40 μg/mL hCA9 into the top concentration well4. In a 96-well black/clear bottom plate, prepare in 1:2 serial dilutions of 4-Nitrophenol or hCA9 in assay buffer, 50 μL/well, with the top concentration of 0.4 mM (2X) 4-Nitrophenol or 40 μg/ml (2X) hCA9 Dilute substrate to 2 mM in Assay Buffer5. Read the product formation by measuring at 400 nm in kinetic mode for 5 minutes.6. Calculate specific activity using the equation below:* Adjusted for substrate blank**Derived using calibration standard 4-NitrophenolPer wellRecombinant human CA9: 1 µgSubstrate: 1 mM
BioLegend carrier-free recombinant proteins provided in liquid format are shipped on blue-ice. Our comparison testing data indicates that when handled and stored as recommended, the liquid format has equal or better stability and shelf-life compared to commercially available lyophilized proteins after reconstitution. Our liquid proteins are validated in-house to maintain activity after shipping on blue ice and are backed by our 100% satisfaction guarantee. If you have any concerns, contact us at [email protected].
Antigen Details
- Structure
- Monomor
- Distribution
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A431 human epithelial carcinoma cells line, U87 MG human glioblastoma/astrocytoma cell line, cancer cells
- Function
- CA9 interconverts carbon dioxide and bicarbonate to maintain acid-base balance in blood and other tissues, and to help transport carbon dioxide out of tissues. HIV-1 infection (VSV-G pseudotyped) of CEMT4 T cells down-regulates plasma membrane expression of CA9.
- Ligand/Receptor
- CO2 and H2O
- Bioactivity
- The esterase activity of CA9 is used to measure its specific activity.
- Cell Type
- Basophils, Mast cells, Monocytes, Neutrophils
- Biology Area
- Angiogenesis, Apoptosis/Tumor Suppressors/Cell Death, Cell Motility/Cytoskeleton/Structure, Cell Proliferation and Viability, Immunology
- Molecular Family
- CD Molecules
- Antigen References
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- Uda NR, et al. 2015. J Enzyme inhib Med Chem. 6:955-60.
- Pastorekova S, et al. 2019. Cancer Metastasis Rev. 38:65-77.
- Pastorek J, et al. 1994. Oncogene. 9:2877-88.
- Loncaster JA, et al. 2001. Cancer Res. 61:6394-9.
- Kaluzova, M, et al. 2004. Mol Cell Biol. 24:5757-66.
- Pan P, et al. 2006. J Physiol. 571:319-27.
- Zhou GX, et al. 2010. Urology. 75:257-61.
- Gene ID
- 768 View all products for this Gene ID
- UniProt
- View information about Carbonic Anhydrase 9 on UniProt.org
Related FAQs
- Why choose BioLegend recombinant proteins?
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• Each lot of product is quality-tested for bioactivity as indicated on the data sheet.
• Greater than 95% Purity or higher, tested on every lot of product.
• 100% Satisfaction Guarantee for quality performance, stability, and consistency.
• Ready-to-use liquid format saves time and reduces challenges associated with reconstitution.
• Bulk and customization available. Contact us.
• Learn more about our Recombinant Proteins. - How does the activity of your recombinant proteins compare to competitors?
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We quality control each and every lot of recombinant protein. Not only do we check its bioactivity, but we also compare it against other commercially available recombinant proteins. We make sure each recombinant protein’s activity is at least as good as or better than the competition’s. In order to provide you with the best possible product, we ensure that our testing process is rigorous and thorough. If you’re curious and eager to make the switch to BioLegend recombinants, contact your sales representative today!
- What is the specific activity or ED50 of my recombinant protein?
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The specific activity range of the protein is indicated on the product datasheets. Because the exact activity values on a per unit basis can largely fluctuate depending on a number of factors, including the nature of the assay, cell density, age of cells/passage number, culture media used, and end user technique, the specific activity is best defined as a range and we guarantee the specific activity of all our lots will be within the range indicated on the datasheet. Please note this only applies to recombinants labeled for use in bioassays. ELISA standard recombinant proteins are not recommended for bioassay usage as they are not tested for these applications.
- Have your recombinants been tested for stability?
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Our testing shows that the recombinant proteins are able to withstand room temperature for a week without losing activity. In addition the recombinant proteins were also found to withstand four cycles of freeze and thaw without losing activity.
- Does specific activity of a recombinant protein vary between lots?
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Specific activity will vary for each lot and for the type of experiment that is done to validate it, but all passed lots will have activity within the established ED50 range for the product and we guarantee that our products will have lot-to-lot consistency. Please conduct an experiment-specific validation to find the optimal ED50 for your system.
- How do you convert activity as an ED50 in ng/ml to a specific activity in Units/mg?
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Use formula Specific activity (Units/mg) = 10^6/ ED50 (ng/mL)
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