Human Macrophage-Derived Chemokine/CCL22 (rHuMDC/CCL22)

• Catalog Number: orb1494955
• Category: Proteins
• Description: MDC is a CC chemokine that is produced in B cells, macrophages, monocyte-derived dendritic cells, activated NK cells and CD4 T cells. It signals through the CCR4 receptor. MDC chemoattracts monocytes, dendritic cells and NK cells and exerts HIV suppressive activity.
• Form/Appearance: Sterile Filtered White lyophilized (freeze-dried) powder.
• MW: 8.1 kDa, a single, non-glycosylated polypeptide chain containing 69 amino acids.
• Protein Sequence: GPYGANMEDS VCCRDYVRYR LPLRVVKHFY WTSDSCPRPG VVLLTFRDKE ICADPRVPWV KMILNKLSQ
• Source: Escherichia coli.
• Biological Activity: Fully biologically active when compared to standard. Determined by its ability to chemoattract human T cells using a concentration range of 10.0-100.0 ng/ml, corresponding to a Specific Activity of ＞1 x 104 IU/mg.
• Endotoxins: Less than 1EU/mg of rHuMDC/CCL22 as determined by LAL method.
• Storage: This lyophilized preparation is stable for several weeks 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.
• Buffer/Preservatives: Lyophilized from a 0.2mm filtered concentrated solution in 20mM PB, pH 7.4, 500mM NaCl.
• Note: For research use only
• Application notes: 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.
• Expiration Date: 6 months from date of receipt.