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EPI-X4, an endogenous peptide fragment of human serum albumin (amino acids 408-423), serves as an antagonist to the chemokine (C-X-C motif) receptor 4 (CXCR4). It effectively prevents calcium mobilization and receptor internalization triggered by chemokine (C-X-C motif) ligand 12 (CXCL12) in HEK293 cells with CXCR4 expression, at concentrations between 0.8 and 1,000 µM. Moreover, EPI-X4 hampers the CXCL12-driven migration of both Jurkat T cells and human CD34+ hematopoietic stem cells. In an acute allergic airway hypereosinophilia mouse model, EPI-X4 intrinsically decreases Cxcr4-dependent inflammatory cell infiltration in airways at a dose of 16 µmol/kg. Additionally, increased urinary EPI-X4 levels, inversely related to glomerular filtration rate (GFR), are observed in chronic kidney disease patients, indicating its potential biomarker role.

| Pack Size | Price | USA Warehouse | Global Warehouse | Quantity |
|---|---|---|---|---|
| 1 mg | $59 | Inquiry | Inquiry | |
| 5 mg | $229 | Inquiry | Inquiry | |
| 10 mg | $336 | Inquiry | Inquiry | |
| 25 mg | $685 | Inquiry | Inquiry |
| Description | EPI-X4, an endogenous peptide fragment of human serum albumin (amino acids 408-423), serves as an antagonist to the chemokine (C-X-C motif) receptor 4 (CXCR4). It effectively prevents calcium mobilization and receptor internalization triggered by chemokine (C-X-C motif) ligand 12 (CXCL12) in HEK293 cells with CXCR4 expression, at concentrations between 0.8 and 1,000 µM. Moreover, EPI-X4 hampers the CXCL12-driven migration of both Jurkat T cells and human CD34+ hematopoietic stem cells. In an acute allergic airway hypereosinophilia mouse model, EPI-X4 intrinsically decreases Cxcr4-dependent inflammatory cell infiltration in airways at a dose of 16 µmol/kg. Additionally, increased urinary EPI-X4 levels, inversely related to glomerular filtration rate (GFR), are observed in chronic kidney disease patients, indicating its potential biomarker role. |
| Synonyms | Endogenous Peptide Inhibitor of CXCR4 |
| Molecular Weight | 1830.18 |
| Formula | C84H144N22O23.XCF3COOH |
| Smiles | [H]N[C@@H](CC(C)C)C(N[C@@H](C(C)C)C(N[C@@H](CCCNC(N)=N)C(N[C@H](C(N[C@]([C@@H](C)O)([H])C(N[C@@H](CCCCN)C(N[C@@H](CCCCN)C(N[C@@H](C(C)C)C(N1CCC[C@H]1C(N[C@@H](CCC(N)=O)C(N[C@@H](C(C)C)C(N[C@@H](CO)C(N[C@]([C@@H](C)O)([H])C(N2CCC[C@H]2C(N[C@]([C@@H](C)O)([H])C(N[C@@H](CC(C)C)C(O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)CC3=CC=C(O)C=C3)=O)=O)=O.OC(C(F)(F)F)=O |
| Sequence | H-Leu-Val-Arg-Tyr-Thr-Lys-Lys-Val-Pro-Gln-Val-Ser-Thr-Pro-Thr-Leu-OH |
| Sequence Short | LVRYTKKVPQVSTPTL |
| Storage | keep away from moisture | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice/Shipping at ambient temperature. |
| Solubility Information | Ethanol: Soluble Methanol: Soluble |
Dissolve 2 mg of the compound in 100 μL DMSO
to obtain a stock solution at a concentration of 20 mg/mL . If the required concentration exceeds the compound's known solubility, please contact us for technical support before proceeding.
1) Add 100 μL of the DMSO
stock solution to 400 μL PEG300
and mix thoroughly until the solution becomes clear.
2) Add 50 μL Tween 80 and mix well until fully clarified.
3) Add 450 μL Saline,PBS or ddH2O
and mix thoroughly until a homogeneous solution is obtained.
| Size | Quantity | Unit Price | Amount | Operation |
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