Rat SDF-1β (rRtSDF-1β/CXCL12 )

• Catalog Number: orb1494997
• Category: Proteins
• Description: SDF-1α and β are stromal derived CXC chemokines, and signal through the CXCR4 receptor. SDF-1α and β chemoattract B and T cells, and have been shown to induce migration of CD34+ stem cells. Additionally, the SDF-1 proteins exert HIV suppressive activity in cells expressing the CXCR4 receptor.
• Form/Appearance: Sterile Filtered White lyophilized (freeze-dried) powder.
• MW: 8.4 kDa, a single non-glycosylated polypeptide chain containing 72 amino acids.
• Protein Sequence: KPVSLSYRCP CRFFESHVAR ANVKHLKILN TPNCALQIVA RLKSNNRQVC IDPKLKWIQE YLDKALNKRL KM
• Source: Escherichia coli.
• Biological Activity: Fully biologically active when compared to standard. Determined by its ability to chemoattract human monocytes using a concentration range of 100.0-200.0 ng/ml, corresponding to a Specific Activity of ＞5 x 103 IU/mg.
• Endotoxins: Less than 1EU/mg of rRtSDF-1β/CXCL12 as determined by LAL method.
• 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.
• Buffer/Preservatives: Lyophilized from a 0.2mm filtered concentrated solution in 20mM PB, pH 7.4, 150mM 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.