Feline Fas/TNFRSF6/CD95 Alexa Fluor® 405-conjugated Antibody

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R&D Systems Antibodies
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Feline Fas/TNFRSF6/CD95 Alexa Fluor® 405-conjugated Antibody Summary

Species Reactivity
Detects feline Fas/TNFRSF6/CD95 in direct ELISAs and Western blots. In direct ELISAs and Western blots no cross-reactivity with recombinant human Fas, recombinant mouse Fas, or recombinant rat Fas are observed
Monoclonal Mouse IgG1 Clone # 431014
Mouse myeloma cell line NS0-derived recombinant feline Fas/TNFRSF6/CD95
Accession # NP_001009314
Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.
Alexa Fluor 405 (Excitation= 405 nm, Emission= 421 nm)


Recommended Concentration
Flow Cytometry
0.25-1 µg/106 cells
Feline peripheral blood mononuclear cells treated with PMA and Ca2+ ionomycin

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

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Preparation and Storage

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: Fas/TNFRSF6/CD95

Feline Fas (fibroblast associated; also named CD95 and APO-1) is a 45 kDa type I transmembrane (TM) glycoprotein that is a member of the TNF receptor superfamily (1-3). The family contains about 30 members, and is characterized by the presence of at least one cysteine-rich domain that contains multiple intrachain disulfide bonds. In general, the superfamily is divided into cytoplasmic death domain (DD) containing, and non-DD containing receptors (3). Feline Fas is synthesized as a 314 amino acid (aa) precursor that contains a 24 aa signal sequence, a 148 aa extracellular region, a 16 aa TM segment, and a 126 aa cytoplasmic tail (4). The extracellular region contains four potential N-linked glycosylation sites plus two distinct cysteine-rich domains of approximately 40 aa each; the cytoplasmic tail shows a 45 aa DD. The extracellular region of feline Fas shares 68%, 65%, 53%, and 58% aa sequence identity to porcine, human, mouse, and rat Fas, respectively. There are five alternate splice forms of feline Fas, which vary from 132 aa to 209 aa in length. All utilize exons 1-3 (aa 1-111) and all are missing the transmembrane segment of the full length form (5). Circulating Fas is reported to be both a dimer and trimer at low ng/mL concentrations. The ligand for Fas is FasL, and Fas ligation activates both the MEK cascade and FADD/caspase-8 pathway (7).

  1. Locksley, R.M. et al. (2001) Cell 104:487.
  2. Gaur, U. and B.B. Aggarwal (2003) Biochem. Pharmacol. 66:1403.
  3. Collette, Y. et al. (2003) Trends Immunol. 24:387.
  4. Mizuno, T. et al. (1998) Vet. Immunol. Immunopathol. 65:161.
  5. Mizuno, T. et al. (2004) Eur. J. Immunogenet. 31:159.
  6. Knipping, E. et al. (1995) Blood 85:1562.
  7. Baker, S.J. and E.P. Reddy (1998) Oncogene 17:3261.
Long Name
Entrez Gene IDs
355 (Human); 14102 (Mouse); 246097 (Rat); 102140989 (Cynomolgus Monkey); 493881 (Feline)
Alternate Names
Apo-1 antigen; Apo-1; apoptosis antigen 1; Apoptosis-mediating surface antigen FAS; APT1; APT1FASTM; CD95 antigen; CD95; CD95ALPS1A; Fas (TNF receptor superfamily, member 6); Fas AMA; Fas antigen; Fas; FAS1; FASLG receptor; TNFRSF6; TNFRSF6member 6; tumor necrosis factor receptor superfamily member 6

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