Fully biologically active when compared to standard. The ED50 determined by a chemotaxis bioassay using human T-lymphocytes is less than 10 ng/ml, corresponding to a specific activity of >, 1.0 × 105 IU/mg.
Reinheit
> 97 % by SDS-PAGE and HPLC analyses.
Endotoxin-Niveau
Level Less than 1EU/µg of rHuMIP-4/CCL18 as determined by LAL method
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.
Lagerung
4 °C
Target
CCL18
(Chemokine (C-C Motif) Ligand 18 (Pulmonary and Activation-Regulated) (CCL18))
CCL18, is a novel CC chemokine that is highly homologous to MIP-1ª (61% amino acid sequence identity). CCL18 cDNA encodes an 89 aa residue precursor protein with a 20 aa putative signal peptide that is cleaved to generate a 69 aa residue mature protein which lacks potential glycosylation sites. In vitro, CCL18 mRNA expression is induced in alternatively activated macrophages by Th2 cytokines such as IL-4, IL-10 and IL-13, and inhibited by IFN-γ. CCL18 mRNA is also expressed by GM-CSF/IL-4-induced monocyte-derived dendritic cells. In vivo, CCL18 is highly expressed in lung and placenta but is not expressed in epidermal Langerhans cells. Recombinant CCL18 has been shown to chemoattract naive T cells, but not monocytes or neutrophils. Synonym: MIP-4/CCL18, Human. Formulation: Lyophilized from a 0.2µm filtered concentrated solution in 20mM PB, pH 7.4, 100mM NaCl.
Molekulargewicht
7.8 kDa, a single non-glycosylated polypeptide chain containing 69 amino acids.