详细说明
Purity
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Level
<0.01 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its ability to chemoattract BaF3 mouse pro‑B cells transfected with human CCR4. The ED 50 for this effect is 0.5-3 ng/mL. Measured by its ability to chemoattract CEM‑NKr human natural killer cell resistant T-lymphoblastoid cells. Howell, D.N. et al. (1985) J. Immunol. 134:971. The ED 50 for this effect is 5-20 ng/mL.
Source
E. coli-derived Gly25-Ser92
Accession #
N-terminal Sequence
AnalysisGly25
Predicted Molecular Mass
7.8 kDa
Carrier Free
What does CF mean?
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
What formulation is right for me?
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
439-MD |
| 439-MD/CF |
Formulation Lyophilized from a 0.2 μm filtered solution in Acetonitrile and TFA with BSA as a carrier protein. | Formulation Lyophilized from a 0.2 μm filtered solution in Acetonitrile and TFA. | |
Reconstitution Reconstitute at 25 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin. | Reconstitution Reconstitute at 100 μg/mL in sterile PBS. | |
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. | Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. | |
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
| Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
|
Background: CCL22/MDC
Mouse ABCD-1, the mouse orthologue of the human macrophage-derived chemokine (MDC)/stimulated T cell chemotactic protein (STCP-1), is a CC chemokine cloned from activated mouse B cells. Mouse MDC cDNA encodes a precursor protein of 92 amino acid (aa) residues with a 24 aa residue predicted signal peptide that is cleaved to yield a 68 aa residue mature 7.8 kDa protein. At the amino acid sequence level, mouse and human MDC share 64% identity and 83% similarity. The genomic organization of the mouse and human MDC genes are very similar, exhibiting sequence identity at the intron-exon boundaries. Mouse MDC is expressed at high levels in dendritic cells and activated B lymphocytes. Low levels of mouse MDC mRNA are also detectable in lung, unstimulated spleen cells, lymph node cells and in thymocytes. MDC is a functional ligand for the CC chemokine receptor 4. Recombinant or chemically synthesized mature mouse MDC has been shown to induce chemotaxis or Ca2+ mobilization in activated mouse and human T cells.
References:
Schaniel, C. et al. (1998) J. Exp. Med. 188:451.
Imai, T. et al. (1998) J. Biol. Chem. 273:1764.
Godiska, R. et al. (1997) J. Exp. Med. 185:1595.
Chang, M-S. et al. (1997) J. Biol. Chem. 272:25229.
Entrez Gene IDs:
6367 (Human); 20299 (Mouse)
Alternate Names:
A-152E5.1; ABCD-1; CC chemokine STCP-1; C-C motif chemokine 22; CCL22; chemokine (C-C motif) ligand 22; DC/B-CK; Macrophage-derived chemokine; MDC; MDCStimulated T-cell chemotactic protein 1; MGC34554; SCYA22MDC(1-69); small inducible cytokine A22; small inducible cytokine subfamily A (Cys-Cys), member 22; Small-inducible cytokine A22; STCP-1; stimulated T cell chemotactic protein 1
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