CD44 Antibody [Unconjugated]

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Western blot shows lysates of RAW 264.7 mouse monocyte/macrophage cell line, mouse spleen tissue, mouse lymph node tissue, and rat brain tissue. PVDF membrane was probed with 1 µg/mL of Sheep ...read more

Product Details

Summary
Reactivity Mu, Rt, Po, EqSpecies Glossary
Applications WB, Simple Western, Flow, B/N, CyTOF-ready, ICC/IF
Clonality
Polyclonal
Host
Sheep
Conjugate
Unconjugated
Concentration
LYOPH

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CD44 Antibody [Unconjugated] Summary

Immunogen
Chinese hamster ovary cell line CHO-derived recombinant mouse CD44
Gln25-Thr224
Accession # NP_033981
Specificity
Detects mouse and rat CD44 in direct ELISAs and Western blots. In direct ELISAs, approximately 35% cross-reactivity with recombinant human CD44 is observed.
Source
N/A
Isotype
IgG
Clonality
Polyclonal
Host
Sheep
Gene
CD44
Purity Statement
Antigen Affinity-purified
Endotoxin Note
<0.10 EU per 1 μg of the antibody by the LAL method.
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.

Applications/Dilutions

Dilutions
  • Blockade of Receptor-ligand Interaction
  • CyTOF-ready
  • Flow Cytometry 2.5 ug/10^6 cells
  • Immunocytochemistry 5-15 ug/mL
  • Simple Western 10 ug/mL
  • Western Blot 1 ug/mL
Reviewed Applications
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Publications
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Packaging, Storage & Formulations

Storage
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.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Preservative
No Preservative
Concentration
LYOPH
Reconstitution Instructions
Sterile PBS to a final concentration of 0.2 mg/mL.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for CD44 Antibody [Unconjugated]

  • CD44 antigen
  • CD44 molecule (Indian blood group)
  • CD44
  • CD44R
  • CDw44
  • cell surface glycoprotein CD44
  • chondroitin sulfate proteoglycan 8
  • CSPG8
  • ECMR-III
  • epican
  • Extracellular matrix receptor III
  • GP90 lymphocyte homing/adhesion receptor
  • HCAM
  • HCELL
  • hematopoietic cell E- and L-selectin ligand
  • Heparan sulfate proteoglycan
  • Hermes antigen
  • homing function and Indian blood group system
  • HUTCH-I
  • Hyaluronate receptor
  • IN
  • LHR
  • MC56
  • MDU2
  • MDU2CD44 antigen (homing function and Indian blood group system)
  • MDU3
  • MDU3CDW44
  • MIC4
  • MIC4MGC10468
  • MUTCH-I
  • Pgp1
  • PGP-1
  • PGP-I
  • Phagocytic glycoprotein 1
  • Phagocytic glycoprotein I

Background

CD44 is a ubiquitously expressed protein that is the major receptor for hyaluronan and exerts control over cell growth and migration (1 - 5). Mouse CD44 has a 22 amino acid (aa) signal sequence, an extracellular domain (ECD) with a 100 aa hyaluronan-binding disulfide-stabilized link region and a 48-463 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 (1‑5). The standard or hematopoietic form, CD44H, does not include the variable segments (1‑5). Cancer aggressiveness and T cell activation have been correlated with expression of specific isoforms (2, 4). With variable N- and O-glycosylation and splicing within the stalk, CD44 can range from 80 to 200 kDa (1, 2). Within the N‑terminal invariant portion of the ECD (aa 23-222), mouse CD44 shares 92%, 77%, 77%, 79% and 71% identity with corresponding rat, human, equine, canine and bovine CD44, respectively. The many reported functions of CD44 fall within three categories (1, 2). First, CD44 binds hyaluronan and other ligands within the extracellular matrix and can function as a "platform" for growth factors and metalloproteinases. Second, CD44 is 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 (6, 7). 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 (8, 9). These cleavage events are thought to promote metastasis by enhancing tumor cell motility and growth (1, 2, 6).

  1. Pure, E. and R.K. Assoian (2009) Cell. Signal. 21:651.
  2. Ponta, H. et al. (2003) Nat. Rev. Mol. Cell Biol. 4:33.
  3. Screaton, G.R. et al. (1992) Proc. Natl. Acad. Sci. USA 89:12160.
  4. Lynch, K.W. (2004) Nat. Rev. Immunol. 4:931.
  5. Yu, Q. and B.P. Toole (1996) J. Biol. Chem. 271:20603.
  6. Nagano, O. and H. Saya (2004) Cancer Sci. 95:930.
  7. Nakamura, H. et al. (2004) Cancer Res. 64:876.
  8. Murakami, D. et al. (2003) Oncogene 22:1511.
  9. Lammich, S. et al. (2002) J. Biol. Chem. 277:44754.

Limitations

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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Application: WB
Species: Rat

Bioinformatics

Gene Symbol CD44
Uniprot