• Purity

  >97%, by SDS-PAGE under reducing conditions and visualized by silver stain.

• Endotoxin Level

  <0.10 EU per 1 μg of the protein by the LAL method.  

• Activity

  Measured by its ability to chemoattract BaF3 mouse pro‑B cells transfected with human XCR1. The ED    ₅₀ for this effect is 0.05‑0.2 µg/mL.

• Source

  E. coli-derived Val22-Gly114, with an N-terminal Met

• Accession #

• N-terminal Sequence    
  Analysis

  Met

• Predicted Molecular Mass

  10.4 kDa

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

Background: XCL1/Lymphotactin

Human lymphotactin (Lptn)/XCL1 (also named human SCM-1 alpha and ATAC) and its mouse homologue 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. Human lymphotactin encodes a 114 amino acid residue precursor protein with a 21 amino acid residue predicted signal peptide. The expression of lymphotactin is abundant in some activated T cells such as activated CD8⁺ T cells and other class I MHC restricted T cells. Lptn expression is absent in CD4⁺ T cells. Human and mouse Lptn share approximately 60% amino acid sequence homology. The gene for lymphotactin has been mapped to chromosome 1 in both human and mouse. Recombinant human lymphotactin has been shown to have chemotactic activity for lymphocytes and NK cells. The orphan receptor GPR5 has been reported to be the specific receptor for Lptn.

• References:

1. Kennedy, J. et al. (1995) J. Immunol. 155:203.

2. Zlotnik, A. et al. (1999) Critical Reviews in Immunol. 19:1.

• Long Name:

  Chemokine [C Motif] Ligand 1

• Entrez Gene IDs:

  6375 (Human); 16963 (Mouse)

• Alternate Names:

  ATAC; ATACSmall-inducible cytokine C1; C motif chemokine 1; chemokine (C motif) ligand 1; Cytokine SCM-1; LPTNSCM-1-alpha; LTNXC chemokine ligand 1; Lymphotactin; lymphotaxin; SCM-1 alpha; SCM-1; SCM1A; SCM-1a; SCYC1SCM1; single cysteine motif 1a; small inducible cytokine subfamily C, member 1 (lymphotactin); XCL1