Product: FAS Antibody
Catalog: BF0557
Description: Mouse monoclonal antibody to FAS
Reactivity: Human
Mol.Wt.: 37kD,50~70kD(Glycosylated); 38kD(Calculated).
Uniprot: P25445
RRID: AB_2833988

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Product Info

ELISA 1:10000, WB 1:500-1:2000, IF/ICC 1:200-1:1000, FCM 1:200-1:400
*The optimal dilutions should be determined by the end user.

WB: For western blot detection of denatured protein samples. IHC: For immunohistochemical detection of paraffin sections (IHC-p) or frozen sections (IHC-f) of tissue samples. IF/ICC: For immunofluorescence detection of cell samples. ELISA(peptide): For ELISA detection of antigenic peptide.

Monoclonal [AFB1965]
FAS antibody detects endogenous levels of total FAS.
Cite Format: Affinity Biosciences Cat# BF0557, RRID:AB_2833988.
Mouse IgG1 in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.


ALPS 1A; ALPS1A; APO 1; Apo 1 antigen; APO 1 cell surface antigen; Apo-1 antigen; APO1; Apo1 antigen; APO1 cell surface antigen; Apoptosis antigen 1; Apoptosis mediating surface antigen FAS; Apoptosis-mediating surface antigen FAS; APT 1; APT1; CD 95; CD 95 antigen; CD95; CD95 antigen; Delta Fas; Delta Fas/APO 1/CD95; Delta Fas/APO1/CD95; Fas (TNF receptor superfamily, member 6); FAS 1; FAS 827dupA; Fas AMA; Fas; FAS Antigen; Fas cell surface death receptor; FAS1; FASLG receptor; FASTM; sFAS; Surface antigen APO1; TNF receptor superfamily, member 6; TNFRSF 6; TNFRSF6; TNR6_HUMAN; Tumor necrosis factor receptor superfamily member 6;



Purified recombinant fragment of human FAS expressed in E. Coli.

P25445 TNR6_HUMAN:

Isoform 1 and isoform 6 are expressed at equal levels in resting peripheral blood mononuclear cells. After activation there is an increase in isoform 1 and decrease in the levels of isoform 6.

The protein encoded by this gene is a member of the TNF-receptor superfamily. This receptor contains a death domain. It has been shown to play a central role in the physiological regulation of programmed cell death, and has been implicated in the pathogenesis of various malignancies and diseases of the immune system. The interaction of this receptor with its ligand allows the formation of a death-inducing signaling complex that includes Fas-associated death domain protein (FADD), caspase 8, and caspase 10. The autoproteolytic processing of the caspases in the complex triggers a downstream caspase cascade, and leads to apoptosis. This receptor has been also shown to activate NF-kappaB, MAPK3/ERK1, and MAPK8/JNK, and is found to be involved in transducing the proliferating signals in normal diploid fibroblast and T cells. At least eight alternatively spliced transcript variants encoding seven distinct isoforms have been described. The isoforms lacking the transmembrane domain may negatively regulate the apoptosis mediated by the full length isoform.

PTMs - P25445 As Substrate

Site PTM Type Enzyme
T28 O-Glycosylation
K33 Ubiquitination
T40 O-Glycosylation
T42 O-Glycosylation
T43 O-Glycosylation
T46 O-Glycosylation
Y91 Phosphorylation
N118 N-Glycosylation
K204 Ubiquitination
S209 Phosphorylation
S212 Phosphorylation
T214 Phosphorylation
T219 Phosphorylation
S225 Phosphorylation
S230 Phosphorylation
Y232 Phosphorylation
T234 Phosphorylation
T241 Phosphorylation
S243 Phosphorylation
K263 Ubiquitination
K274 Ubiquitination
K287 Ubiquitination
K288 Ubiquitination
Y291 Phosphorylation
T293 Phosphorylation
K296 Ubiquitination
K300 Ubiquitination
T305 Phosphorylation
K309 Ubiquitination
T312 Phosphorylation
K316 Ubiquitination
S320 Phosphorylation
S322 Phosphorylation
S325 Phosphorylation
S333 Phosphorylation

Research Backgrounds


Receptor for TNFSF6/FASLG. The adapter molecule FADD recruits caspase-8 to the activated receptor. The resulting death-inducing signaling complex (DISC) performs caspase-8 proteolytic activation which initiates the subsequent cascade of caspases (aspartate-specific cysteine proteases) mediating apoptosis. FAS-mediated apoptosis may have a role in the induction of peripheral tolerance, in the antigen-stimulated suicide of mature T-cells, or both. The secreted isoforms 2 to 6 block apoptosis (in vitro).


N- and O-glycosylated. O-glycosylated with core 1 or possibly core 8 glycans.

Subcellular Location:

Cell membrane>Single-pass type I membrane protein.






Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
Tissue Specificity:

Isoform 1 and isoform 6 are expressed at equal levels in resting peripheral blood mononuclear cells. After activation there is an increase in isoform 1 and decrease in the levels of isoform 6.

Subunit Structure:

Binds DAXX. Interacts with HIPK3 (By similarity). Part of a complex containing HIPK3 and FADD (By similarity). Binds RIPK1 and FAIM2. Interacts with BABAM2 and FEM1B. Interacts with FADD. Interacts directly (via DED domain) with NOL3 (via CARD domain); inhibits death-inducing signaling complex (DISC) assembly by inhibiting the increase in FAS-FADD binding induced by FAS activation (By similarity). Interacts with CALM. In the absence of stimulation, interacts with BIRC2, DDX3X and GSK3B. The interaction with BIRC2 and DDX3X is further enhanced upon receptor stimulation and accompanied by DDX3X and BIRC2 cleavage.


Contains a death domain involved in the binding of FADD, and maybe to other cytosolic adapter proteins.

Research Fields

· Cellular Processes > Cell growth and death > p53 signaling pathway.   (View pathway)

· Cellular Processes > Cell growth and death > Apoptosis.   (View pathway)

· Cellular Processes > Cell growth and death > Necroptosis.   (View pathway)

· Environmental Information Processing > Signal transduction > MAPK signaling pathway.   (View pathway)

· Environmental Information Processing > Signaling molecules and interaction > Cytokine-cytokine receptor interaction.   (View pathway)

· Environmental Information Processing > Signal transduction > TNF signaling pathway.   (View pathway)

· Human Diseases > Drug resistance: Antineoplastic > Platinum drug resistance.

· Human Diseases > Endocrine and metabolic diseases > Non-alcoholic fatty liver disease (NAFLD).

· Human Diseases > Endocrine and metabolic diseases > Type I diabetes mellitus.

· Human Diseases > Neurodegenerative diseases > Alzheimer's disease.

· Human Diseases > Infectious diseases: Parasitic > Chagas disease (American trypanosomiasis).

· Human Diseases > Infectious diseases: Parasitic > African trypanosomiasis.

· Human Diseases > Infectious diseases: Viral > Hepatitis B.

· Human Diseases > Infectious diseases: Viral > Measles.

· Human Diseases > Infectious diseases: Viral > Influenza A.

· Human Diseases > Infectious diseases: Viral > Human papillomavirus infection.

· Human Diseases > Infectious diseases: Viral > Herpes simplex infection.

· Human Diseases > Cancers: Overview > Pathways in cancer.   (View pathway)

· Human Diseases > Cancers: Overview > Proteoglycans in cancer.

· Human Diseases > Immune diseases > Autoimmune thyroid disease.

· Human Diseases > Immune diseases > Allograft rejection.

· Human Diseases > Immune diseases > Graft-versus-host disease.

· Organismal Systems > Immune system > Natural killer cell mediated cytotoxicity.   (View pathway)

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