Recombinant Human Platelet Factor-4/CXCL4 (Human PF-4/CXCL4) _ C230476

Description

CXCL4, also called PF4 (platelet factor 4), is an 8 kDa member of the CXC chemokine family, sharing features with CXCL8/IL-8 and CXCL7/NAP-2. Mature human CXCL4 shares 65-76% amino acid sequence identity with mouse, rat, bovine, ovine and porcine
CXCL4. The active protein is a tetramer of CXCL4 subunits that forms a ring of heparin-binding positive charges from sites at the C-terminal region of each monomer. Megakaryocytes synthesize CXCL4 and store it in platelet alpha -granules. Secretion from activated platelets can produce micromolar levels in serum and over 100-fold higher within clots. In contrast to other CXC chemokines, CXCL4 does not contain an ELR motif and lacks binding to nearly all chemokine receptors. A potential high-affinity
G-protein-coupled receptor for CXCL4, the CXCR3 isoform CXCR3B, is expressed in human but not mouse. In most cases, it is likely that cell surface binding and signaling properties of CXCL4 are due to binding of glycosaminoglycans chains, particularly
chondroitin sulfates. CXCL4 released from activated platelets binds and regulates thrombin/thrombomodulin complexes, regulates and enhances production of activated Protein C (APC), and limits the coagulation cascade. It binds and influences the enzymatic activity of coagulation factor Xa. It binds fibrin and affects clot structure. Therapeutic doses of the anticoagulant heparin neutralize CXCL4 procoagulant effects.

 

Product Properties

 

Synonyms

Iroplact, Oncostatin-A

Accession
P02776
GeneID
5196

Source

E.coli-derived Human GRO-γ,Glu32-Ser101.
Molecular Weight
Approximately 7.8 kDa
AA Sequence

EAEEDGDLQC LCVKTTSQVR PRHITSLEVI KAGPHCPTAQ LIATLKNGRK ICLDLQAPLY KKIIKKLLES

Tag
None
Physical Appearance
Sterile Filtered White lyophilized (freeze-dried) powder.
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 fibroblasts is in a concentration of 1.0-10 ng/mL.
Endotoxin
< 1 EU per 1μg of the protein by the LAL method.
Formulation
Lyophilized from a 0.2 μm filtered concentrated solution in Acetonitrile and TFA
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.

 

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.

 

Caution

 

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.

Recombinant Human Platelet Factor-4/CXCL4 (Human PF-4/CXCL4) _ C230476

Product form

SKU: C230476E

$74.00

      • Tell a unique detail about this product

      Description

      CXCL4, also called PF4 (platelet factor 4), is an 8 kDa member of the CXC chemokine family, sharing features with CXCL8/IL-8 and CXCL7/NAP-2. Mature human CXCL4 shares 65-76% amino acid sequence identity with mouse, rat, bovine, ovine and porcine
      CXCL4. The active protein is a tetramer of CXCL4 subunits that forms a ring of heparin-binding positive charges from sites at the C-terminal region of each monomer. Megakaryocytes synthesize CXCL4 and store it in platelet alpha -granules. Secretion from activated platelets can produce micromolar levels in serum and over 100-fold higher within clots. In contrast to other CXC chemokines, CXCL4 does not contain an ELR motif and lacks binding to nearly all chemokine receptors. A potential high-affinity
      G-protein-coupled receptor for CXCL4, the CXCR3 isoform CXCR3B, is expressed in human but not mouse. In most cases, it is likely that cell surface binding and signaling properties of CXCL4 are due to binding of glycosaminoglycans chains, particularly
      chondroitin sulfates. CXCL4 released from activated platelets binds and regulates thrombin/thrombomodulin complexes, regulates and enhances production of activated Protein C (APC), and limits the coagulation cascade. It binds and influences the enzymatic activity of coagulation factor Xa. It binds fibrin and affects clot structure. Therapeutic doses of the anticoagulant heparin neutralize CXCL4 procoagulant effects.

       

      Product Properties

       

      Synonyms

      Iroplact, Oncostatin-A

      Accession
      P02776
      GeneID
      5196

      Source

      E.coli-derived Human GRO-γ,Glu32-Ser101.
      Molecular Weight
      Approximately 7.8 kDa
      AA Sequence

      EAEEDGDLQC LCVKTTSQVR PRHITSLEVI KAGPHCPTAQ LIATLKNGRK ICLDLQAPLY KKIIKKLLES

      Tag
      None
      Physical Appearance
      Sterile Filtered White lyophilized (freeze-dried) powder.
      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 fibroblasts is in a concentration of 1.0-10 ng/mL.
      Endotoxin
      < 1 EU per 1μg of the protein by the LAL method.
      Formulation
      Lyophilized from a 0.2 μm filtered concentrated solution in Acetonitrile and TFA
      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.

       

      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.

       

      Caution

       

      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.

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