Introduction
CTACK, also known as CCL27, is a chemokine that plays a crucial role in the migration of T cells to the skin. It acts as a chemoattractant, guiding skin-associated memory T lymphocytes to cutaneous sites. CTACK exerts its effects by binding to the CCR10 receptor.
Description
Recombinant Mouse CTACK, expressed in E. coli, is a single, non-glycosylated polypeptide chain comprising 95 amino acids. With a molecular weight of 10.9 kDa, this protein is purified using proprietary chromatographic techniques.
Physical Appearance
Sterile Filtered White lyophilized powder.
Formulation
Lyophilized from a 0.2µm filtered solution in 20mM PB, pH 7.4, and 300mM NaCl.
Solubility
To reconstitute lyophilized CTACK, it is recommended to dissolve it in sterile 18 MΩ-cm H₂O to a concentration of at least 100 µg/ml. This solution can be further diluted in other aqueous solutions.
Stability
Lyophilized CTACK is stable at room temperature for up to 3 weeks; however, it is recommended to store it desiccated below -18°C. After reconstitution, CTACK should be stored at 4°C for 2-7 days. For long-term storage, freeze at -18°C, adding a carrier protein (0.1% HSA or BSA) is recommended. Avoid repeated freeze-thaw cycles.
Purity
Purity exceeds 98.0% as determined by: (a) Reverse-phase high-performance liquid chromatography (RP-HPLC) analysis, and (b) SDS-polyacrylamide gel electrophoresis (SDS-PAGE) analysis.
Biological Activity
Biological activity, assessed through a chemotaxis bioassay employing human peripheral blood lymphocytes, is observed within a concentration range of 10-100 ng/ml.
Synonyms
C-C motif chemokine 27, CC chemokine ILC, Cutaneous T-cell-attracting chemokine, CTACK, ESkine, IL-11 R-alpha-locus chemokine, ALP, mILC, Skinkine, Small-inducible cytokine A27, Ccl27, Ilc, Scya27.
Amino Acid Sequence
LPLPSSTSCC TQLYRQPLPS RLLRRIVHME LQEADGDCHL QAVVLHLARR SVCVHPQNRS LARWLERQGK RLQGTVPSLN LVLQKKMYSN PQQQN.