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 IgG 2B Clone # 170138
Purification
Protein A or G purified from hybridoma culture supernatant
Immunogen
E. coli-derived recombinant human CXCL4/PF4
Glu32-Ser101
Accession # P02776.2Formulation
Supplied in a saline solution containing BSA and Sodium Azide.
Label
Phycoerythrin
Applications
Recommended
ConcentrationSample
Intracellular Staining by Flow Cytometry
10 µL/10 6 cells
See below
Please Note: Optimal dilutions should be determined by each laboratory for each application. are available in the Technical Information section on our website.
Data Examples
Intracellular Staining by Flow Cytometry | Detection of CXCL4/PF4 in Human Dendritic Cells by Flow Cytometry. Human immature dendritic cells were stained with Mouse Anti-Human CXCL4/PF4 PE‑conjugated Monoclonal Antibody (Catalog # IC7952P, filled histogram) or isotype control antibody (Catalog # , open histogram). To facilitate intracellular staining, cells were fixed with Flow Cytometry Fixation Buffer (Catalog # ) and permeabilized with Flow Cytometry Permeabilization/Wash Buffer I (Catalog # ). View our protocol for . |
Preparation and Storage
Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Protect from light. Do not freeze.
12 months from date of receipt, 2 to 8 °C as supplied.
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:
Poncz, M. et al. (1987) Blood 69:219.
Scheuerer, B. et al. (2000) Blood 95:1158.
Perollet, C. et al. (1998) Blood 91:3289.
Petersen, F. et al. (1998) J. Immunol. 161:4347.
Petersen, F. et al. (1999) J. Biol. Chem. 274:12376.
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
