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Synonyms
soluble Fas Ligand (sFasL), TNFSF6, CD95L, Apo I Ligand, APTL
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Alternative_names
soluble Fas Ligand (sFasL), TNFSF6, CD95L, Apo I Ligand, APTL
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Description
Leads to down-regulation of the immune response
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Recombinant
Yes
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Source
CHO cells
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Purity by SDS PAGE
≥95%
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Assay
SDS-PAGE
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Endotoxin Level
< 0.1 ng/ug of protein (
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Activity Specifications test method
Determined by its ability to induce cytotoxicity in Jurkat cells in the absence of any cross-linking. The ED50 for this effect is ≤10.0 ng/ml, corresponding to a specific activity of ≥ 1 x 105 units/mg.
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Biological activity
Determined by its ability to induce cytotoxicity in Jurkat cells in the absence of any cross-linking. The ED50 for this effect is ≤10.0 ng/ml, corresponding to a specific activity of ≥ 1 x 105 units/mg.
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Molecular Weight
17.9 kDa
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Storage Temp
-20°C
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Shipping
Gel Pack
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Shelf Life
12 months
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Appearance
Lyophilized powder
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Physical form description
Sterile filtered through a 0.2 micron filter. Lyophilized from 0.5x PBS, pH 7.5.
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Reconstitution Instructions
Centrifuge the vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex. This solution can be stored at 2-8°C for up to 1 week. For extended storage, it is recommended to further dilute in a buffer containing a carrier protein (example 0.1% BSA) and store in working aliquots at -20°C to -80°C.
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Background Information
Fas Ligand (FasL) is a member of the TNF superfamily that is expressed on the cell surface of activated T cells. Binding of FasL to Fas Receptor triggers apoptosis in Fas-bearing cells. FasL has the ability to kill T cells and activated B cells which leads to down-regulation of the immune response. The mechanism of Fas induced apoptosis involves recruitment of procaspase 8 through an adaptor molecule called FADD followed by processing of the pro-enzyme to active forms. These active caspases then cleave various cellular substrates leading to the eventual cell death. Both human and murine sFasL are fully active on human and murine cells. Recombinant human soluble Fas Ligand is a 17.9 kDa protein comprising the TNF homologous region of FasL and contains an 8 residue N-terminal His-Tag.
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Amino acid sequence
HHHHHHHHPS PPPEKKELRK VAHLTGKSNS RSMPLEWEDT YGIVLLSGVK YKKGGLVINE TGLYFVYSKV YFRGQSCNNL PLSHKVYMRN SKYPQDLVMM EGKMMSYCTT GQMWARSSYL GAVFNLTSAD HLYVNVSELS LVNFEESQTF FGLYKL
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Handling
Centrifuge the vial prior to opening.
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Usage
For Research Use Only! Not to be used in humans
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Properties
Human proteins, cDNA and human recombinants are used in human reactive ELISA kits and to produce anti-human mono and polyclonal antibodies. Modern humans (Homo sapiens, primarily ssp. Homo sapiens sapiens). Depending on the epitopes used human ELISA kits can be cross reactive to many other species. Mainly analyzed are human serum, plasma, urine, saliva, human cell culture supernatants and biological samples.
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Additional description
FAS ligand and other ligands are binding to the receptor for signaling pathways for example in apoptosis or JNK signaling. Receptor agonists are often tested for drug development.
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Additional source
Recombinants or rec. proteins
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Group
recombinants
