CXCL7 Protein (AA 48-109)

Catalog No. ABIN2666927

Product Details

Target: CXCL7 (PPBP) (Pro-Platelet Basic Protein (Chemokine (C-X-C Motif) Ligand 7) (PPBP))

Protein Type: Recombinant

Biological Activity: Active

Protein Characteristics: AA 48-109

Origin: Mouse

Source: Escherichia coli (E. coli)

Application: Flow Cytometry (FACS)

Purity: > 98 % , as determined by Coomassie stained SDS-PAGE.

Sterility: 0.22 μm filtered

Endotoxin Level:

Less than 0.01 ng per μg cytokine as determined by the LAL method.

Application Details

Application Notes: Optimal working dilution should be determined by the investigator.

Comment:

Biological activity: Bioactivity was measured by its property to chemoattract human neutrophils in a dose dependent manner.

Restrictions: For Research Use only

Handling

Format: Liquid

Reconstitution: For maximum results, quick spin vial prior to opening. Stock solutions should be prepared at no less than 10 μg/mL in sterile buffer (PBS, HPBS, DPBS, and EBSS) containing carrier protein such as 1 % BSA or HSA. After dilution, the cytokine can be stored between 2 °C and 8 °C for one month or from -20 °C to -70 °C for up to 3 months.

Buffer: 0.22 μm filtered protein solution is in PBS.

Handling Advice: Avoid repeated freeze/thaw cycles.

Storage: -20 °C

Storage Comment: Unopened vial can be stored between 2°C and 8°C for three months, at -20°C for six months, or at -70°C for one year.

Target Details

Target: CXCL7 (PPBP) (Pro-Platelet Basic Protein (Chemokine (C-X-C Motif) Ligand 7) (PPBP))

Alternative Name: CXCL7 (PPBP Products)

Synonyms: 2400003M24Rik Protein, AI854500 Protein, CTAP3 Protein, CTAPIII Protein, Cxcl7 Protein, LA-PF4 Protein, LDGF Protein, MDGF Protein, NAP-2 Protein, NAP-2-L1 Protein, Scyb7 Protein, TGB Protein, TGB1 Protein, THBGB1 Protein, b-TG1 Protein, beta-TG Protein, B-TG1 Protein, Beta-TG Protein, CTAP-III Protein, CXCL7 Protein, PBP Protein, SCYB7 Protein, TC1 Protein, TC2 Protein, THBGB Protein, Nap-2 Protein, CTAPIII/NAP-2 Protein, Platelet basic protein Protein, pro-platelet basic protein Protein, scyb7 Protein, Ppbp Protein, PPBP Protein

Background: CXCL7 is an ERL+ chemokine that is secreted by activated platelets, neutrophils, lymphocytes, and macrophages as a precursor. Pro-platelet basic protein or leukocyte derived grow factor (PPBP/LDGF) (a protein of ~14 kD) is modified by post-transcriptional cleavage to give rise to connective tissue activating peptide (CTAP-III), CXCL7, β -thromboglobulin (β-TG), and two variants of thrombocidin (TC-1 and TC-2). CTAP-III is activated by enzymatic proteolysis performed by cell surface-bound cathepsin G (CathG), a chymotryptic serine protease found in primary neutrophil granules. In this way, neutrophils are the mayor cells that convert CTAP-III into CXCL7. In addition, monocytes and mast cells can proteolytically modify CTAP-III to produce CXCL7. In fact, CathG has been detected in mast cells in addition to chymase, another chymotryptic enzyme. Further C-terminal truncations, that eliminate the last four and seven amino acids in CXCL7, generate two additional natural isoforms, these variants are more potent neutrophils activators. High levels of CTAP-III have been detected in plasma of patients with lung cancer. In fact, it has been suggested as a biomarker for early lung cancer detection. An increase in positive immunostained cells has been detected in the bronchial submucosa of patients with stable severe chronic obstructive pulmonary disease. Also, studies with premalignant breast cancer cells transfected with CXCL7 showed that these cells became as invasive as malignant breast cancer cells. In addition, CXCL7 induces stimulation of the lymphangiogenic factors VEGF-C and VEGF-D in human breast cancer cells, suggesting an important role for CXCL7 in tumor invasion.

Molecular Weight: The 62 amino acid recombinant protein has a predicted molecular mass of approximately 6.7 kDa. The DTT-reduced and non-reduced protein migrate at approximately 11 and 9 kDa by SDS-PAGE respectively. The N-terminal amino acid is Ile.