Name : SDF-1α/CXCL12, Mouse

Product Concentration :

Background :
Stromal-Cell Derived Factor-1 alpha/ CXCL12 (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. Mice lacking SDF-1 or CXCR4 have been found to have impaired B-lymphopoiesis, myelopoiesis, vascular development, cardiogenesis and abnormal neuronal cell migration and patterning in the central nervous system.

Biological Activity :
The EC50 value of mouse SDF-1 α/CXCL12 on Ca2+ mobilization assay in CHO-K1/Gα15/mCXCR4 cells (human Gα15 and mCXCR4 stably expressed in CHO-K1 cells) is less than 1.5 μg/ml.

expression system :

Tag :
SDF-1α/CXCL12 (Lys22-Lys89)Accession # Q4FJL5

Protein Accession No. :

Synonyms :
SDF-1-α; SDF1α; CXCL-12; IRH; PBSF; SCYB12; SDF1; TLSF; TPAR1; C-X-C motif chemokine ligand 12

Molecular Weight :
~8 kDa, on SDS-PAGE under reducing conditions.

Purity :
> 95% as analyzed by SDS-PAGE

Product Concentration :
Lyophilized after extensive dialysis against PBS.

Storage and Stability :
Upon receiving, this product remains stable for up to 6 months at lower than -70°C. Upon reconstitution, the product should be stable for up to 1 week at 4°C or up to 3 months at -20°C. For long term storage it is recommended that a carrier protein (example 0.1% BSA) be added. Avoid repeated freeze-thaw cycles.

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