Cat Number: 91010ES

XCL1-2

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Genus

Mouse

Source

E.coli

Synonyms

ATAC, C motif chemokine 1, Cytokine SCM-1, Lymphotaxin, SCM-1-alpha, Small-inducible cytokine C1

Description

Mouse lymphotactin (Lptn) and its human homologue (also named human SCM-1 and ATAC) belong to the C or gamma subfamily of chemokines. The C chemokines lack two (the 1st and 3rd) of the four invariant cysteine residues normally found in the CC and CXC chemokines and have an extended carboxy terminus. Mouse lymphotactin encodes a 114 amino acid residue precursor protein with a 21 amino acid residue predicted signal peptide. The expression of lymphotactin is restricted to activated mouse pro-T cells and to activated, class I MHC restricted T cells. The gene for lymphotactin has been mapped to chromosome 1 in both human and mouse. Recombinant mouse lymphotactin has been shown to have chemotactic activity for lymphocytes, NK cells and mouse splenocytes.

Molecular Weight

Approximately 10.1 kDa.

AA sequence

VGTEVLEESS CVNLQTQRLP VQKIKTYIIW EGAMRAVIFV TKRGLKICAD PEAKWVKAAI KTVDGRASTR KNMAETVPTG AQRSTSTAIT LTG

Appearance

Sterile Filtered White lyophilized (freeze-dried) powder.

Purity

> 97% by SDS-PAGE and HPLC analyses.

Biological Activity

The ED50 as determined by a chemotaxis bioassay using human XCR1 transfected murine BaF3 cells is less than 100 ng/mL, corresponding to a specific activity of > 1.0 × 104 IU/mg. Fully biologically active when compared to standard.

Endotoxin

< 0.1 EU per 1μg of the protein by the LAL method.

Formulation

Lyophilized from a 0.2 μm filtered concentrated solution in PBS, pH 7.4.

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.

Note

5, 100, 500μg