Introduction
Macrophage Inflammatory Proteins (MIPs), classified as chemokines, are chemotactic cytokines. Humans possess two primary forms: MIP-1α (officially CCL3) and MIP-1β (officially CCL4). Macrophages primarily produce both forms upon stimulation by bacterial endotoxins. These proteins activate human granulocytes, including neutrophils, eosinophils, and basophils, potentially resulting in acute neutrophilic inflammation. Furthermore, they stimulate fibroblasts and macrophages to synthesize and release other pro-inflammatory cytokines such as interleukin 1 (IL-1), IL-6, and TNF-α. Notably, the genes encoding CCL3 and CCL4 are both situated on human chromosome 17.
Description
Recombinant Mouse Macrophage Inflammatory Protein-1 beta, produced in E. coli, is a single, non-glycosylated polypeptide chain comprising 69 amino acids. With a molecular weight of 7808 Daltons, MIP-1b undergoes purification using proprietary chromatographic techniques.
Physical Appearance
Sterile Filtered White lyophilized powder.
Formulation
Lyophilized from a 1 mg/ml solution in water, free of additives.
Solubility
Reconstitute the lyophilized Mouse MIP-1b in sterile 18 MΩ-cm H2O to a concentration of at least 100 µg/ml. This solution can be further diluted in other aqueous solutions.
Stability
Lyophilized Mouse MIP-1b remains stable at room temperature for up to 3 weeks. However, it is recommended to store it desiccated below -18°C. After reconstitution, store Mouse CCL4 at 4°C for 2-7 days. For long-term storage, freeze at -18°C. To enhance stability during long-term storage, consider adding a carrier protein (0.1% HSA or BSA). Avoid repeated freeze-thaw cycles.
Purity
Purity exceeds 98.0% as determined by: (a) Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) analysis, and (b) SDS-PAGE analysis.
Biological Activity
The biological activity of Mouse MIP-1 beta is determined by its chemoattractant properties on human blood monocytes. At concentrations of 20-100 ng/ml, it exhibits a specific activity ranging from 10,000 to 50,000 IU/mg.
Synonyms
Small inducible cytokine A4, CCL4, Macrophage inflammatory protein 1-beta, MIP-1- beta, MIP-1-beta(1-69), T-cell activation protein 2, ACT-2, PAT 744, H400, SIS-gamma, Lymphocyte activation gene 1 protein, LAG-1, HC21, G-26 T-lymphocyte-secreted protein, chemokine (C-C motif) ligand 4, ACT2, G-26, LAG1, MIP1B, SCYA2, SCYA4, AT744.1, MGC104418, MGC126025, MGC126026.
Amino Acid Sequence
APYGADTPTA CCFSYSRKIP RQFIVDYFET SSLCSQPGVI FLTKRNRQIC ADSKETWVQE YITDLELNA.