Fas (C18C12) Rabbit mAb #4233

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Supporting Data

REACTIVITY	H
SENSITIVITY	Endogenous
MW (kDa)	40-50
Source/Isotype	Rabbit IgG

Application Key:

WB-Western Blotting
IHC-Immunohistochemistry

Species Cross-Reactivity Key:

H-Human

Product Information

Product Usage Information

Application	Dilution
Western Blotting	1:1000
Immunohistochemistry (Paraffin)	1:250 - 1:1000

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

For a carrier free (BSA and azide free) version of this product see product #49414.

Protocol

Specificity / Sensitivity

Fas (C18C12) Rabbit mAb detects endogenous levels of total human Fas protein.

Species Reactivity:

Human

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Ile262 within the intracellular region of human Fas protein.

Background

Association of the receptor Fas with its ligand FasL triggers an apoptotic pathway that plays an important role in immune regulation, development, and progression of cancers (1,2). Loss of function mutation in either Fas (lpr mice) or FasL (gld mice) leads to lymphadenopathy and splenomegaly as a result of decreased apoptosis in CD4-CD8- T lymphocytes (3,4). FasL (CD95L, Apo-1L) is a type II transmembrane protein of 280 amino acids (runs at approximately 40 kDa upon glycosylation) that belongs to the TNF family, which also includes TNF-α, TRAIL, and TWEAK. Binding of FasL to its receptor triggers the formation of a death-inducing signaling complex (DISC) involving the recruitment of the adaptor protein FADD and caspase-8 (5). Activation of caspase-8 from this complex initiates a caspase cascade resulting in the activation of caspase-3 and subsequent cleavage of proteins leading to apoptosis. Unlike Fas, which is constitutively expressed by various cell types, FasL is predominantly expressed on activated T lymphocytes, NK cells, and at immune privileged sites (6). FasL is also expressed in several tumor types as a mechanism to evade immune surveillance (7). Similar to other members of the TNF family, FasL can be cleaved by metalloproteinases producing a 26 kDa trimeric soluble form (8,9).

Database Links

UniProt ID: P25445

Entrez-Gene Id: 355

Limited Uses

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For Research Use Only. Not For Use In Diagnostic Procedures.

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U.S. Patent No. 7,429,487, foreign equivalents, and child patents deriving therefrom.

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