| Source: |
Escherichia coli |
| Molecular Weight: |
Approximately 7.8 kDa, a single non-glycosylated polypeptide chain containing 69 amino acids. |
| AA Sequence: |
APIGSDPPTS CCFSYTSRKI HRNFVMDYYE TSSLCSQPAV VFLTKKGRQI CADPSEPWVN EYVNDLELN |
| Purity: |
> 95% 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 peripheral blood monocytes is in a concentration range of 10-1000 ng/mL. |
| Physical Appearance: |
Sterile filtered white lyophilized (freeze-dried) powder. |
| Formulation: |
Lyophilized from a 0.2 µm filtered concentrated solution in 2 × PBS, pH7.4, 3% trehalose. |
| Endotoxin: |
Less than 1 EU/µg of rRtMIP-1β/CCL4 as determined by LAL method. |
| 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. |
| Stability & Storage: |
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70°C as supplied.
1 month, 2 to 8°C under sterile conditions after reconstitution.
3 months, -20 to -70°C under sterile conditions after reconstitution. |
| Synonyms: |
Small-inducible Cytokine A4 |
| Background: |
Chemokine (C-C motif) ligand 4, encoded by the CCL4 gene and also known as macrophage inflammatory protein-1β (MIP-1β), is a CC chemokine that specifically targets CCR5 receptors. It is a significant HIV-suppressive factor produced by CD8+ T cells. Additionally, CCL4 serves as a chemoattractant for natural killer cells, monocytes, and various other immune cells. Recombinant CCL4 has been shown to inhibit different strains of HIV-1, HIV-2, and simian immunodeficiency virus (SIV) in a dose-dependent manner. Recombinant rat CCL4, which consists of 69 amino acids, shares 80% and 86% sequence identity with human and murine CCL4, respectively. Both human and murine MIP-1α and MIP-1β are active in human and murine hematopoietic cells. |
