{"product_id":"recombinant-rat-sdf-1-alpha-rrtsdf-1a-cxcl12-pr3012","title":"Recombinant Rat SDF-1 alpha (rRtSDF-1a\/CXCL12 ) - PR3012","description":"\u003cp\u003eRecombinant Rat SDF-1 alpha (rRtSDF-1a\/CXCL12 )\u003c\/p\u003e\n\n\u003cp\u003eCatalogue Numbers: PR3012-2, PR3012-10\u003c\/p\u003e\n\n\u003cp\u003eSizes: 2µg, 10µg\u003c\/p\u003e\n\n\u003cp\u003eSource: Escherichia coli\u003c\/p\u003e\n\n\u003cp\u003eMolecular Weight: 7.9 kDa, a single non-glycosylated polypeptide chain containing 68 amino acids.\u003c\/p\u003e\n\n\u003cp\u003ePurity: \u0026gt;97% by SDS-PAGE and HPLC analyses.\u003c\/p\u003e\n\n\u003cp\u003eBiological Activity: Fully biologically active when compared to standard. Determined by its ability to chemoattract human peripheral blood monocytes using a concentration range of 50.0-100.0 ng\/ml, corresponding to a Specific Activity of ＞1 x 104 IU\/mg.\u003c\/p\u003e\n\n\u003cp\u003ePhysical Appearance: Sterile Filtered White lyophilized (freeze-dried) powder.\u003c\/p\u003e\n\n\u003cp\u003eFormulation: Lyophilized from a 0.2mm filtered concentrated solution in 20mM PB, pH 7.4, 150mM NaCl.\u003c\/p\u003e\n\n\u003cp\u003eAA Sequence: KPVSLSYRCP CRFFESHVAR ANVKHLKILN TPNCALQIVA RLKSNNRQVCIDPKLKWIQE YLDKALNK\u003c\/p\u003e\n\n\u003cp\u003eEndotoxin: Less than 1EU\/mg of rRtSDF-1a\/CXCL12 as determined by LAL method.\u003c\/p\u003e\n\n\u003cp\u003eReconstitution: 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 \u0026lt;-20°C. Further dilutions should be made in appropriate buffered solutions.\u003c\/p\u003e\n\n\u003cp\u003eStorage: 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.\u003c\/p\u003e\n\n\u003cp\u003eUsage: This material is offered by USA Bioworld biotech for research, laboratory or further evaluation purposes. NOT FOR HUMAN USE. Made in China\u003c\/p\u003e\n\n\u003cp\u003eDescription: SDF-1α and SDF-1β, members of the chemokine α subfamily that lack the ELR domain, were initially identified using the signal sequence trap cloning strategy from a mouse bone-marrow stromal cell line. These proteins were subsequently also cloned from a human stromal cell line as cytokines that supported the proliferation of a stromal cell-dependent pre-B-cell line. SDF-1α and SDF-1β cDNAs encode precursor proteins of 89 and 93 amino acid residues, respectively. Both SDF-1α and SDF-1β are encoded by a single gene and arise by alternative splicing. The two proteins are identical except for the four amino acid residues that are present in the carboxy-terminus of SDF-1β and absent from SDF-1α. SDF-1\/PBSF is highly conserved between species, with only one amino acid substitution between the mature human and mouse proteins. SDF-1\/PBSF acts via the chemokine receptor CXCR4 and has been shown to be a chemoattractant for T-lymphocytes, monocytes, pro- and pre- B cells, but not neutrophils.\u003c\/p\u003e","brand":"BioWorld","offers":[{"title":"2µg","offer_id":42882223079603,"sku":"PR3012-2","price":260.23,"currency_code":"CAD","in_stock":true},{"title":"10µg","offer_id":42882223112371,"sku":"PR3012-10","price":490.83,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0305\/9482\/6376\/products\/thumbnail_d1447bac803ec9be_11-14-09-19-51_611bf97b-3de7-4446-bf71-7c3494f845cb.jpg?v=1702049558","url":"https:\/\/afsbio.com\/products\/recombinant-rat-sdf-1-alpha-rrtsdf-1a-cxcl12-pr3012","provider":"AFSBio Inc.","version":"1.0","type":"link"}