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Background: Epithelial neutrophil- activating protein 78 (ENA-78) is a member of the CXC chemokines and acts as a potent chemoattractant and activator of neutrophil function. On stimulation in vitro, ENA-78 is highly expressed in many cell types. ENA-78 protein levels are strongly elevated in synovial fluid and blood of patients with rheumatoid arthritis. By in situ hybridization and immunofluorescence staining, ENA-78 has been recognized as a major CXC chemokine expressed in epithelial cells of the intestinal mucosa of patients with Crohn's disease, ulcerative colitis, and acute appendicitis.
Biological Activity: Determined by its ability to chemoattract human neutrophils using a concentration range of 2.0-40.0 ng/ml.
Description: Recombinant CXCL5 is a disulfide-linked monomeric protein consisting of 75 amino acid residues and migrates as an approximately 8 kDa protein under non-reducing conditions and reducing conditions in SDS-PAGE. Optimized DNA sequence encoding Human ENA-78 (CXCL5) mature chain was expressed in E. coli.
Endotoxin Level: <0.1 ng/µg (1 EU/µg), using the LAL gel clot method.
Format: lyophilized protein
Formulation: Lyophilized from 0.2 µm filtered 20 mM phosphate buffer, 100 mM NaCl solution, pH 7.5.
Genbank: P42830
Purity: ≥98% by SDS-PAGE and HPLC
Reconstitution: Reconstitute at 0.1-1.0 mg/ml in distilled water. This solution can then be diluted into other buffers. To maximize product collection from vial surface, vortex briefly and then spin down to recollect the liquid.
Storage Stability: The lyophilized protein is stable for at least 2 years from date of receipt when stored at -20°C. Upon reconstitution, store in working aliquots at +4°C for up to one month, or at -20°C for up to six months, in the presence of a carrier protein. Avoid repeated freeze/thaw cycles.
Uniprot: P42830
Warnings: Avoid freeze/thaw cycles.
Biosafety Level: Not applicable (BSL-1)
References: 1. J. Immunol., Mar 2011, 186: 3197 - 3205.
2. J. Immunol., Nov 2010, 185: 6214 - 6225.
3. J. Biol. Chem., Sep 2010, 285: 29750 - 29759.
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