Measured by its ability to chemoattract 2-day cultured human monocytes. Matsushima, K. et al. (1989) J. Exp. Med. 169:1485. The ED50 for this effect is 0.02-0.06 µg/mL. Measured by its ability to chemoattract BaF3 mouse pro‑B cells transfected with human CCR2A. The ED50 for this effect is 0.5-2 µg/mL.
Source
E. coli-derived human CCL13/MCP-4 protein Gln24-Thr98
>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
8.6 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 327-P4 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 PBS with BSA as a carrier protein.
Purity
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Reconstitution Instructions
Reconstitute at 100 μg/mL in sterile deionized water.
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Human CCL13/MCP-4 Protein
C-C motif chemokine 13
CCL13
chemokine (C-C motif) ligand 13
CKb10
MCP4
MCP-4
MCP-4Monocyte chemoattractant protein 4
MGC17134
NCC-1Monocyte chemotactic protein 4
NCC1Small-inducible cytokine A13
new CC chemokine 1
SCYA13CK-beta-10
SCYL1
small inducible cytokine subfamily A (Cys-Cys), member 13
Background
Human CCL13 is a CC chemokine recently cloned from a human fetal and a human heart cDNA library. Human CCL13 cDNA encodes a 98 amino acid residue precursor protein with a 23 amino acid residue hydrophobic signal peptide that is cleaved to yield an 8 kDa, 75 aa mature CCL13. Mature CCL13 lacks any potential N-glycosylation sites and shares a pyroglutamate proline motif with other human MCP proteins. Human CCL13 is most homologous to MCP-1, 3 and Eotaxin, exhibiting approximately 65 - 66% amino acid sequence identity. CCL13 mRNA is expressed by a number of activated cell types, including endothelial cells, macrophages, bronchial epithelium and type II alveolar cells, and perhaps lymphocytes. CCL13 is a chemoattractant for monocytes and eosinophils, and activates basophils. In addition, it has been reported to be chemotactic for CD4+ and CD8+ T cells, with an activity almost equivalent to that of MCP-3. The bioactivities of CCL13 is most likely mediated by the CC chemokine receptors CCR-2 and CCR-3, both of which have been shown to bind CCL13.
Garcia-Zepeda, E.A. et al. (1996) J. Immunol. 157:5613.
Uguccioni, M. et al. (1996) J. Exp. Med. 183:2379.
Godisha, R. et al. (1997) J. Leukoc, Biol. 61:353.
Stellato, C. et al. (1997) J. Clin. Invest. 99:926.
Heath, H. et al. (1997) J. Clin. Invest. 99:178.
Charo, I.F. et al. (1994) Proc. Natl. Acad. Sci. USA 91:2752.
Daugherty, B.L. et al. (1996) J. Exp. Med. 183:2349.
Combadiere, C. et al. (1995) J. Biol. Chem. 270:16491.
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