Description
Description
CXCL11, also known as I-TAC, SCYB9B, H174 and beta -R1, is a non-ELR CXC chemokine. CXCL11 cDNA encodes a 94 amino acid (aa) residue precursor protein with a 21 aa residue putative signal sequence, which is cleaved to form the mature 73 aa residue protein. CXCL11 shares 36% and 37% amino acid sequence homology with IP-10 and MIG (two other known human non-ELR CXC chemokines), respectively. CXCL11 is expressed at low levels in normal tissues including thymus, spleen and pancreas. The expression of CXCL11 mRNA is radically up regulated in IFN-gamma and IL-1 stimulated astrocytes. Moderate increase in expression is also observed in stimulated monocytes. CXCL11 has potent chemoattractant activity for IL-2 activated T cells and transfected cell lines expressing CXCR3, but not freshly isolated T cells, neutrophils or monocytes.
Product Properties
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Synonyms
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Beta-R1, H174, IP-9, Small-inducible Cytokine B11
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Uniprot No.
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O14625; Gene ID 6373
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Source
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E.coli-derived Human CXCL11,Phe22-Phe94.
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Amino Acid
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FPMFKRGRCL CIGPGVKAVK VADIEKASIM YPSNNCDKIE VIITLKENKG QRCLNPKSKQARLIIKKVER KNF
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Molecular Weight
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Approximately 8.3 kDa
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Biological Activity
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Fully biologically active when compared to standard. The biological activity determined by a chemotaxis bioassay using human IL-2 activated human T-lymphocytes is in a concentration range of 0.1-10 ng/mL.
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Purity
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> 97% by SDS-PAGE and HPLC analyses.
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Endotoxin
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< 1 EU per 1μg of the protein by the LAL method.
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Formulation
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Lyophilized from a 0.2 µm filtered concentrated solution in 20 mM PB, pH 7.4, 100 mM NaCl.
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Reconstitution
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We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1 % BSA to a concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions.
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Shipping and Storage
The products are shipped with ice pack and can be stored at -20℃ to -80℃ for 1 year.
Recommend to aliquot the protein into smaller quantities when first used and avoid repeated freeze-thaw cycles.
Cautions
1. Avoid repeated freeze-thaw cycle.
2. For your safety and health, please wear lab coats and disposable gloves for operation.
3. For research use only.
Usage
1. It is recommended to reconstitute the lyophilized powder with sterile water, ensuring that the solution concentration is not less than 100 μg/mL, and let it stand for at least 20 minutes to fully dissolve.
2. After reconstitution, the solution can be further diluted and aliquoted, stored at 2-8°C with a shelf life of 1 month, and at -20°C with a shelf life of 3 months; avoid repeated freezing and thawing.
3. When further diluting and aliquoting the reconstituted solution, a certain amount of carrier protein should be added (0.1% BSA, 10% FBS, or 5% HSA). For experiments that require serum-free conditions, it can be replaced with a 5% trehalose solution as the carrier.
