CD44 Antibody (2C5) [Unconjugated] - s Pan Specific Summary
Recombinant human CD44v3-10 (includes the invariant N-terminal exons and CD44v3-10 exons)
Detects human CD44s on a panel of CD44 transfected COS cells by flow cytometry (Fox, S.B. et al. (1994) Cancer Res. 54:4539). This antibody recognizes an epitope in the invariant N-terminal region of all CD44 protein isoforms.
|Details of Functionality
ActivityAssaywCitation not found None None None None None
Test in a species/application not listed above to receive a full credit towards a future purchase.
- Western Blot 2 ug/mL
- Simple Western 20 ug/mL
- Flow Cytometry 2.5 ug/10^6 cells
- Immunohistochemistry 8-25 ug/mL
Packaging, Storage & Formulations
|Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Sterile PBS to a final concentration of 0.5 mg/mL.
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for CD44 Antibody (2C5) [Unconjugated] - s Pan Specific
- CD44 antigen
- CD44 molecule (Indian blood group)
- cell surface glycoprotein CD44
- chondroitin sulfate proteoglycan 8
- Extracellular matrix receptor III
- GP90 lymphocyte homing/adhesion receptor
- hematopoietic cell E- and L-selectin ligand
- Heparan sulfate proteoglycan
- Hermes antigen
- homing function and Indian blood group system
- Hyaluronate receptor
- MDU2CD44 antigen (homing function and Indian blood group system)
- Phagocytic glycoprotein 1
- Phagocytic glycoprotein I
CD44 is a ubiquitously expressed protein that is the major receptor for hyaluronan and exerts control over cell growth and migration (1-3). Human CD44 has a 20 amino acid (aa) signal sequence, an extracellular domain (ECD) with a 100 aa hyaluronan-binding disulfide-stabilized link region and a 325-530 aa stem region, a 21 aa transmembrane domain, and a 72 aa cytoplasmic domain. Within the stem, ten variably spliced exons (v1-10, exons 6-15) produce multiple protein isoforms (1‑3). The standard or hematopoietic form, CD44s, does not include the variable segments (1‑3). Cancer aggressiveness and T cell activation have been correlated with expression of specific isoforms (1, 3). With variable N- and O-glycosylation and splicing within the stalk, CD44 can range from 80-200 kDa (1). Within the N‑terminal invariant portion of the ECD (aa 21-220), human CD44 shares 76%, 76%, 86%, 83%, and 79% identity with corresponding mouse, rat, equine, canine, and bovine CD44, respectively. The many reported functions of CD44 fall within three categories (1). First, CD44 binds hyaluronan and other ligands within the extracellular matrix and can function as a “platform” for growth factors and metalloproteinases. Second, CD44 can function as a co-receptor that modifies activity of receptors including MET and the ERBB family of tyrosine kinases. Third, the CD44 intracellular domain links the plasma membrane to the actin cytoskeleton via the ERM proteins, ezrin, radixin and moesin. CD44 can be synthesized in a soluble form (4) or may be cleaved at multiple sites by either membrane-type matrix metalloproteinases, or ADAM proteases to produce soluble ectodomains (5, 6). The cellular portion may then undergo gamma secretase-dependent intramembrane cleavage to form an A beta -like transmembrane portion and a cytoplasmic signaling portion that affects gene expression (7, 8). These cleavage events are thought to promote metastasis by enhancing tumor cell motility and growth (1, 5).
- Ponta, H. et al. (2003) Nat. Rev. Mol. Cell Biol. 4:33.
- Screaton, G.R. et al. (1992) Proc. Natl. Acad. Sci. USA 89:12160.
- Lynch, K.W. (2004) Nat. Rev. Immunol. 4:931.
- Yu, Q. and B.P. Toole (1996) J. Biol. Chem. 271:20603.
- Nagano, O. and H. Saya (2004) Cancer Sci. 95:930.
- Nakamura, H. et al. (2004) Cancer Res. 64:876.
- Murakami, D. et al. (2003) Oncogene 22:1511.
- Lammich, S. et al. (2002) J. Biol. Chem. 277:44754.
This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed
for 1 year from date of receipt.
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