Human Fractalkine HEK293 Overexpression Lysate

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Human Fractalkine HEK293 Overexpression Lysate: Product Information

Product Description
This Human Fractalkine overexpression lysate was created in HEK293 Cells and intented for use as a Western blot (WB) positive control. Purification of Fractalkine protein (Cat: 10636-H08H) from the overexpression lysate was verified.
Expression Host
HEK293 Cells
Species
Human
Sequence Information
A DNA sequence encoding the human CX3CL1 (NP_002987.1) extracellular domain (Met 1-Arg 339) with a C-terminal polyhistidine tag was expressed.
Molecule Mass
The secreted recombinant human CX3CL1 comprises 329 amino acids with a predicted molecular mass of 35 kDa. As a result of different glycosylation, rhCX3CL1 migrates between 50-70 kDa in SDS-PAGE under reducing conditions.

Human Fractalkine HEK293 Overexpression Lysate: Usage Guide

Preparation Method
Cell lysate was prepared by homogenization of the over-expressed cells in ice-cold modified RIPA Lysis Buffer with cocktail of protease inhibitors (Sigma). Cell debris was removed by centrifugation. Protein concentration was determined by Bradford assay (Bio-Rad protein assay, Microplate Standard assay). The cell lysate was boiled for 5 min in 1 x SDS loading buffer (50 mM Tris-HCl pH 6.8, 12.5% glycerol, 1% sodium dodecylsulfate, 0.01% bromophenol blue) containing 5% b-mercaptoethanol, and lyophilized.
Lysis Buffer
Modified RIPA Lysis Buffer: 50 mM Tris-HCl pH 7.4, 150 mM NaCl, 1mM EDTA, 1% Triton X-100, 0.1% SDS, 1% Sodium deoxycholate, 1mM PMSF.
Recommend Usage
1.  Centrifuge the tube for a few seconds and ensure the pellet at the bottom of the tube. 2.  Re-dissolve the pellet using 200μL pure water and boil for 2-5 min.
Sample Buffer
1 X Sample Buffer (1 X modified RIPA buffer+1 X SDS loading buffer).
Stability & Storage
Store at 4℃ for up to twelve months from date of receipt. After re-dissolution, aliquot and store at -80℃ for up to twelve months. Avoid repeated freeze-thaw cycles.
Application
Western Blot (WB)
Optimal dilutions/concentrations should be determined by the end user.

Human Fractalkine HEK293 Overexpression Lysate: Alternative Names

Human ABCD-3 Overexpression Lysate; Human C3Xkine Overexpression Lysate; Human CXC3 Overexpression Lysate; Human CXC3C Overexpression Lysate; Human fractalkine Overexpression Lysate; Human neurotactin Overexpression Lysate; Human NTN Overexpression Lysate; Human NTT Overexpression Lysate; Human SCYD1 Overexpression Lysate

Fractalkine Background Information

Fractalkine or Chemokine (C-X3-C motif) ligand 1 (CX3CL1) is a member of the CX3C chemokine family. Fractalkine / CX3CL1 is a unique chemokine that functions not only as a chemoattractant but also as an adhesion molecule and is expressed on endothelial cells activated by proinflammatory cytokines, such as interferon-gamma and tumor necrosis factor-alpha. Fractalkine/CX3CL1 is expressed in a membrane-bound form on activated endothelial cells and mediates attachment and firm adhesion of T cells, monocytes and NK cells. Fractalkine / CX3CL1 is associated with dendritic cells (DC) in epidermis and lymphoid organs. The fractalkine receptor, CX3CR1, is expressed on cytotoxic effector lymphocytes, including natural killer (NK) cells and cytotoxic T lymphocytes, which contain high levels of intracellular perforin and granzyme B, and on macrophages. Soluble fractalkine causes migration of NK cells, cytotoxic T lymphocytes, and macrophages, whereas the membrane-bound form captures and enhances the subsequent migration of these cells in response to secondary stimulation with other chemokines.
Full Name
chemokine (C-X3-C motif) ligand 1
References
  • Imai T, et al. (1997) Identification and molecular characterization of fractalkine receptor CX3CR1, which mediates both leukocyte migration and adhesion. Cell. 91(4): 521-30.
  • Papadopoulos EJ, et al. (1999) Fractalkine, a CX3C chemokine, is expressed by dendritic cells and is up-regulated upon dendritic cell maturation. Eur J Immunol. 29 (8): 2551-9.
  • Umehara H, et al. (2004) Fractalkine in vascular biology: from basic research to clinical disease". Arterioscler. Thromb Vasc Biol. 24 (1): 34-40.
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