名称：重组大鼠Eotaxin-2/CCL24
Synonyms：CK-beta-6, MPIF-2, Small-inducible Cytokine A24
Source：Escherichia coli.
Molecular Weight：Approximately 10.5 kDa, a single non-glycosylated polypeptide chain consisting of an N-terminal Methionine and the mature rat Eotaxin-2.
Quantity：5µg/20µg/1000µg
AA Sequence：MPTGSVTIPS SCCVTFISKK IPVNRVISYQ LANGSICPKA GVIFITKKGH KICTDPKLPW VQKHIKNLDA KRNQPSEGAK ALGPKFVIQK LRGNSTKV
Purity：> 96 % by SDS-PAGE and HPLC analyses.
Biological Activity：Fully biologically active when compared to standard. The biologically active determined by a chemotaxis bioassay using human peripheral blood eosinophils is in a concentration of 50-250 ng/ml.
Physical Appearance：Sterile Filtered White lyophilized (freeze-dried) powder.
Formulation：Lyophilized from a 0.2 µm filtered concentrated solution in 2 × PBS, pH 7.4.
Endotoxin：Less than 1 EU/µg of rRtEotaxin-2/CCL24 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.
Reference：1. Owczarek W, Paplinska M, Targowski T, et al. 2010. Cytokine, 50: 181-5.
2. Ben-Yehuda C, Bader R, Puxeddu I, et al. 2008. Exp Lung Res, 34: 467-79.
3. Schaefer D, Meyer JE, Pods R, et al. 2006. Int Arch Allergy Immunol, 140: 205-14.
Background：CCL24, also named MPIF-2, Eotaxin-2 and Ckβ6, is a novel CC chemokine recently identified. It is a secreted protein, encoded by CCL24 gene, and produced by activated monocytes and T lymphocytes. CCL24 signals through the CCR3 receptor and has functions of chemotactic activity for resting T-lymphocytes and eosinophils, but none for monocytes and activated lymphocytes. The plasma levels of CCL24 and the aspirin-exacerbated respiratory disease (such as asthma) morbidity rate have positive correlation.
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