- Source
- Escherichia coli.
- Molecular Weight
- Approximately 8.2 kDa, a single non-glycosylated polypeptide chain containing 76 amino acids.
- AA Sequence
- VTSAGPEESD GDLSCVCVKT ISSGIHLKHI TSLEVIKAGR HCAVPQLIAT LKNGRKICLD RQAPLYKKVI KKILES
- Purity
- > 97 % by SDS-PAGE and HPLC analyses.
- Biological Activity
- Fully biologically active when compared to standard. The biological activity determined by a chemotaxis bioassay using human neutrophils is in a concentration of 10-100ng/ml.
- Physical Appearance
- Sterile Filtered White lyophilized (freeze-dried) powder.
- Formulation
- Lyophilized from a 0.2 μm filtered concentrated solution in 20 mM PB, 1.5 M NaCl, pH 7.4.
- Endotoxin
- Less than 1 EU/μg of rMuPF-4/CXCL4 as determined by LAL method.
- Reconstitution
- 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.
- Stability & Storage
- Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 3 months, -20 to -70 °C under sterile conditions after reconstitution. - Usage
- This material is offered by Shanghai PrimeGene Bio-Tech for research, laboratory or further evaluation purposes. NOT FOR HUMAN USE.
- Reference
- 1. O'Donovan N, Galvin M, Morgan JG. 1999. Cytogenet Cell Genet. 84:39-42.
2. Eisman R, Surrey S, Ramachandran B, et al. 1990. Blood. 76:336-44.
3. Lasagni L, Francalanci M, Annunziato F, et al. 2003. J Exp Med. 197:1537-49.
4. Warkentin TE. 2007. N Engl J Med. 356:891-3. - Background
- CXCL4 (PF4) is a small cytokine belonging to the CXC chemokine family and it is also known as chemokine (C-X-C motif) ligand 4 (CXCL4). This chemokine is released from alpha-granules of activated platelets during platelet aggregation and neutralizes the anticoagulant effect of heparin because it binds more strongly to heparin than to the chondroitin-4-sulfate chains of the carrier molecule. CXCL4 interacts with a splice variant of the chemokine receptor CXCR3. Recombinant mouse CXCL4 contains 76 amino acids which is a single non-glycosylated polypeptide chain. Specifically, Human and mouse CXCL4 share about a 60 % identity.
