- Other Names
- Monocyte chemeotactic protein 4 (MCP4), CKž10, New CC chemokine 1 (NCC1), Small inducible cytokine subfamily a, member 13 (SCYA13)
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- Product Citations
Human CCL13 (MCP-4) was initially identified in a library constructed from human fetal mRNA. CCL13 shares a high similarity with CCL2 (MCP-1, 61%), CCL7 (MCP-3, 58%), and CCL8 (MCP-2, 55%). CCL13 is constitutively expressed at high levels in the small intestine, colon, and lung. Original data showed that CCL13 was less effective than MCP-1 and MCP-3 in monocyte and lymphocyte chemoattraction, but equivalent to eotaxin as a chemoattractant for eosinophils. Chemokines are very important in the inflammatory process, initially in the influx of PMN by CXC chemokines and subsequently chemoattracting monocytes where the MCPs participate, including CCL13. The bioactivity of pro-inflammatory chemokines is regulated by MMPs in order to regulate the influx of different cell subpopulations. In the case of CCL13, it is inactivated by MMP-12 by truncation at position 4-5 generating a CCR antagonist and decreasing the arrival of monocytes. CCL13 binds to CCR2, and this receptor also binds to CCL2, CCL8, CCL7, CCL11, CCL24, and CCL26. CCL13 is involved in inflammatory diseases such as rheumatoid arthritis (RA), atherosclerosis, and asthma. High levels of CCL13 have been detected in the synovial fluid of patients with RA, in serum of asthmatic patients, and in plasma of patients with symptomatic carotid atherosclerosis.Product Details
- Human CCL13, amino acids (Gln24-Thr98) (Accession# NM_005408) was expressed in E. coli.
- Molecular Mass
- The 75 amino acid recombinant protein has a predicted molecular mass of approximately 8.6 kD. The DTT-reduced and non-reduced protein migrate at approximately 11-13 and 14-16 kD by SDS-PAGE respectively. The N-terminal amino acid is Gln.
- >95%, as determined by Coomassie stained SDS-PAGE.
- 0.22 µm filtered protein solution is in PBS.
- Endotoxin Level
- Less than 0.01 ng per µg cytokine as determined by the LAL method.
- 10 and 25 µg sizes are bottled at 200 µg/mL. 100 µg size and larger sizes are lot-specific and bottled at the concentration indicated on the vial (please contact technical support for concentration, or use our Lookup tool if you have a lot number.) Please note, new lots of the 100 µg size will be lot-specific and may differ from previous lots that had a fixed concentration.
- 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.
- Bioactivity was measured by its property to chemoattract THP-1 cells in a dose dependent manner.
- Application Notes
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@example.com.
- Epithelial cells, endothelial cells, fibroblasts, chondrocytes, macrophages
- CCL13 chemoattract monocytes, eosinophils, CD4, and CD8 T cells. CCL13 induces histamine release from IL-3-primed peripheral blood basophils. IFN-γ induces CCL13 in bronchial epithelial cell lines, endothelial cells, and chondrocytes, and a synergistic effect is obtained with INF-γ and TNF-α or IL-1 in chondrocytes. CCL13 is processed and inactivated by MMP-12.
- Monocytes, dendritic cells, basophils, eosinophils, T cells
- CCR2, CCR3, and CCR5
- Biology Area
- Cell Biology, Signal Transduction
- Molecular Family
- Antigen References
1. Uguccioni M, et al. 1996. J. Exp. Med. 183:2379.
2. Godiska R, et al. 1997. J. Leukoc. Biol. 61:353.
3. Kalayci O, et al. 2004. J. Asthma 41:27.
4. Iwamoto T, et al. 2007. FEBS J. 274:4904.
5. Mendez-Enriquez E, et al. 2008. Clin. Exp. Immunol. 152:354.
6. Hintzen C, et al. 2009. Arthritis Rheum. 60:1932.
7. Dean RA, et al. 2008. Blood 112:3455.
8. Breland UM, et al. 2010. Cardiovasc. Res. 86:265.
- Gene ID
- 6357 View all products for this Gene ID
- View information about CCL13 on UniProt.org
- Does specific activity of a recombinant protein vary between lots?
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.
- Have your recombinants been tested for stability?
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.
- How do you convert activity as an ED50 in ng/ml to a specific activity in Units/mg?
- Use formula Specific activity (Units/mg) = 10e6/ ED50 (ng/mL)
- How does the activity of your recombinant proteins compare to competitors?
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?
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.