Recombinant Human CCL24/Eotaxin-2/MPIF-2 Protein Summary
Details of Functionality
Measured by its ability to chemoattract Y3 rat myeloid cells transfected with human CCR3. The ED50 for this effect is 0.01-0.05 µg/mL. Measured by its ability to chemoattract BaF3 mouse pro‑B cells transfected with mouse CCR3. The ED50 for this effect is 0.01-0.05 µg/mL.
Source
E. coli-derived human CCL24/Eotaxin-2/MPIF-2 protein Val27-Cys119
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.
Applications/Dilutions
Dilutions
Bioactivity
Bioactivity2
Theoretical MW
10.6 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Publications
Read Publications using 343-E2 in the following applications:
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.
Buffer
Lyophilized from a 0.2 μm filtered solution in Acetonitrile and TFA with BSA as a carrier protein.
Purity
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain
Reconstitution Instructions
Reconstitute at 20 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Human CCL24/Eotaxin-2/MPIF-2 Protein
CCL24
chemokine (C-C motif) ligand 24
Ckb-6
Eosinophil chemotactic protein 2
Eotaxin-2
member 24
MPIF2
MPIF-2
MPIF2Myeloid progenitor inhibitory factor 2
MPIF-2Small-inducible cytokine A24
SCYA24CK-beta-6
Background
Eotaxin, also named MPIF-2 and Ck beta 6, is a novel CC chemokine identified in the Human Genome Sciences, Inc. database based on the presence of the CC motif and homology with other known CC chemokines. Eotaxin-2 cDNA encodes a 119 amino acid residue precursor protein with a 26 aa residue signal peptide that is cleaved to generate a mature protein predicted to contain 93 amino acid residues with an N-glycosylation site. Although one recombinant preparation of MPIF-2/Eotaxin-2 from insect cells was reported to be glycosylated and of the predicted size (10.5 kDa), a second preparation of recombinant Eotaxin-2 prepared by a different group, also from insect cells, was shown to contain a 78 amino acid residue carboxy-terminally truncated variant of Eotaxin-2. Additional minor carboxy-terminally truncated variants with 73, 75 and 76 residues were also isolated. Compared to other CC chemokines, Eotaxin-2 exhibits 40%, 42% and 39% amino acid identity to MCP-3, MIP-1 alpha , and Eotaxin, respectively. Eotaxin-2 mRNA is weakly expressed in activated monocytes and T lymphocytes.
Recombinant Eotaxin-2 has been shown to induce chemotaxis of eosinophils, basophils, and resting T lymphocytes but not monocytes and activated T lymphocytes. Eotaxin-2 has also been shown to suppress the colony formation by the high proliferative potential colony-forming cells which represent multipotential hematopoietic progenitors. On eosinophils, the effects of Eotaxin-2 was shown to be inhibited by an anti-CCR-3 antibody and to be cross-desensitized by Eotaxin or MCP-4, suggesting that all three CC chemokines act through CCR-3, at least on eosinophils.
Forssmann, U. et al. (1997) J. Exp. Med. 185:2171.
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