Human CXCL4/PF4 Alexa Fluor® 405-conjugated Antibody

Catalog # Availability Size / Price Qty
IC7952V-100UG
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Human CXCL4/PF4 Alexa Fluor® 405-conjugated Antibody Summary

Species Reactivity
Human
Specificity
Detects human CXCL4/PF4 in direct ELISAs and Western blots. In Western blots, no cross-reactivity with recombinant mouse (rm) CXCL6, recombinant human (rh) CXCL6, rhCXCL7, rmCXCL13 or rhCCL21 is observed.
Source
Monoclonal Mouse IgG2b Clone # 170138
Immunogen
E. coli-derived recombinant human CXCL4/PF4
Glu32-Ser101
Accession # P02776.2
Formulation
Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.
Label
Alexa Fluor 405

Applications

Recommended Concentration
Sample
Intracellular Staining by Flow Cytometry
0.25-1 µg/106 cells
Human immature dentritic cells fixed with paraformaldehyde and permeabilized with saponin

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

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Preparation and Storage

Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: CXCL4/PF4

CXCL4, also known as Platelet Factor 4 (PF4), is an 8 kDa CXC chemokine that is stored in platelet alpha -granules as a homotetramer and secreted abundantly during platelet activation. Human CXCL4 is a 101 amino acid (aa) protein with a 32 aa signal sequence and a 70 aa mature protein that includes granule targeting and
heparin-binding sequences. CXCL4 has homology with IL-8 and beta -thromboglobulin and can form heteromultimers with IL-8. Mature human and mouse CXCL4 share 76% aa identity. The active protein consists of a tetramer composed of individual CXCL4 subunits. Megakaryocytes synthesize CXCL4 and store it as tetramers in
alpha -granules. The CXCL4 tetramers are secreted by activated platelets and can be measured at micromolar levels in serum. In contrast to other CXC chemokines, CXCL4 lacks chemotactic activity for polymorphonuclear granulocytes. CXCL4 does not contain an ELR motif. However, many other functions have been observed for CXCL4. CXCL4 is involved in monocyte survivial and differentiation into macrophages, has anti-angiogenic activity and promotes granule Protein C activation. CXCL4 has been demonstrated to inhibit the binding of FGF-2 to high-affinity receptors and its subsequent internalization. Cell surface neutrophil chondroitin sulfate chains serve as CXCL4 binding sites; affinity is controlled by the degree of sulfation of these chains.

References
  1. Poncz, M. et al. (1987) Blood 69:219.
  2. Scheuerer, B. et al. (2000) Blood 95:1158.
  3. Perollet, C. et al. (1998) Blood 91:3289.
  4. Petersen, F. et al. (1998) J. Immunol. 161:4347.
  5. Petersen, F. et al. (1999) J. Biol. Chem. 274:12376.
  6. Watanabe, O. et al. (1999) J. Hum. Genet. 44:173.
Entrez Gene IDs
5196 (Human); 56744 (Mouse); 360918 (Rat)
Alternate Names
chemokine (C-X-C motif) ligand 4; C-X-C motif chemokine 4; CXCL4; CXCL4iroplact; Iroplact; MGC138298; Oncostatin-A; PF4; PF-4; platelet factor 4; SCYB4oncostatin-A

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