Source:

Escherichia coli.

Molecular Weight:

8.9 kDa, a single non-glycosylated polypeptide chain containing 76 amino acids.

Purity:

>96% by SDS-PAGE and HPLC analyses.

Biological activity:

Fully biologically active when compared to standard. Measured by its ability to chemoattract THP-1 human acute monocytic leukemia cells.The ED50 for this effect is typically 0.03-0.1μg/mL, corresponding to a Specific Activity of ＞1 x 104 IU/mg.

AA Sequence:

QPDSVSIPITCCFNVINRKIPIQRLESYTRITNIQCPKEAVIFKTKRGKEVCADPKERWVRDSMKHLDQIFQNLKP

Endotoxin:

Less than 1EU/mg of rHuMCP-2/CCL8 as determined by LAL method.

Formulation:

Lyophilized from a 0.2mm filtered concentrated solution in 20mM PB, pH 7.4, 100mM NaCl.

Background:

MCP-2 and MCP-3 are two monocyte chemotactic proteins produced by human MG-63 osteosarcoma cells. Both MCP-2 and MCP-3 are members of the CC family of chemokines and share 62% and 71% amino acid sequence identity, respectively, with MCP-1.MCP-3 also shares 58% amino acid identity with MCP-2. Similarly to other CC chemokines, all three MCP proteins are monocyte chemoattractants. In addition,the three MCPs can chemoattract activated NK cells as well as CD4+ and CD8+ T lymphocytes. All three cytokines have also been shown to attract eosinophils and induce histamine secretion from basophils.

Usage:

This material is offered by USA Bioworld biotech for research, laboratory or further evaluation purposes. NOT FOR HUMAN USE.

Physical Appearance:

Sterile Filtered White lyophilized (freeze-dried) powder.

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.

Storage:

This lyophilized preparation is stable at 2-8°C, but should be kept at -20°C for long term storage, preferably desiccated. Upon reconstitution, the preparation is stable for up to one week at 2-8°C. For maximal stability, apportion the reconstituted preparation into working aliquots and store at -20°C to -70°C. Avoid repeated freeze/thaw cycles.