CD23/Fc epsilon RII Antibody [Biotin]

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications WB, ELISA(Det)
Clonality
Polyclonal
Host
Goat
Conjugate
Biotin
Concentration
LYOPH

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CD23/Fc epsilon RII Antibody [Biotin] Summary

Immunogen
Mouse myeloma cell line NS0-derived recombinant human CD23
Met150-Ser321
Accession # P06734
Specificity
Detects human CD23 in ELISAs and Western blots. In sandwich immunoassays, less than 0.1% cross-reactivity with rmSIGNR1 Fc Chimera, rhDC-SIGNR Fc Chimera and rhDC-SIGN Fc Chimera is observed.
Source
N/A
Isotype
IgG
Clonality
Polyclonal
Host
Goat
Gene
FCER2
Purity
Antigen Affinity-purified
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.

Applications/Dilutions

Dilutions
  • Western Blot 0.1 ug/mL
  • ELISA Capture (Matched Antibody Pair) 2-8 ug/mL
  • ELISA Detection (Matched Antibody Pair) 0.1-0.4 ug/mL
  • ELISA Standard (Matched Pair)
Application Notes
ELISA Capture: Human CD23/Fc epsilon RII Antibody (Catalog # MAB1231)
ELISA Detection: Human CD23/Fc epsilon RII Biotinylated Antibody (Catalog # BAF123)
Standard:Recombinant Human CD23/Fc epsilon RII (Catalog # 123-FE)
Readout System
Publications
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BAF123 in the following applications:

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 BSA as a carrier protein.
Preservative
No Preservative
Concentration
LYOPH
Purity
Antigen Affinity-purified
Reconstitution Instructions
Reconstitute at 0.2 mg/mL in sterile PBS.

Notes

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

Alternate Names for CD23/Fc epsilon RII Antibody [Biotin]

  • BLAST-2
  • CD23
  • CD23A
  • CD23CD23 antigen
  • CLEC4J
  • CLEC4JC-type lectin domain family 4 member J
  • C-type lectin domain family 4, member J
  • Fc epsilon RII
  • Fc fragment of IgE, low affinity II, receptor for (CD23)
  • FCE2Fc fragment of IgE, low affinity II, receptor for (CD23A)
  • fc-epsilon-RII
  • FCER2
  • Fcer2a
  • FceRII
  • IGEBF
  • Immunoglobulin E-binding factor
  • low affinity immunoglobulin epsilon Fc receptor
  • Ly-42
  • Lymphocyte IgE receptor

Background

CD23 (also named B cell differentiation antigen) is a member of subgroup II of the C-type (Ca++-dependent) lectin superfamily (1 - 5). Human CD23 is a 47 kDa, type II transmembrane glycoprotein that is expressed by a wide variety of cell types (6 - 10). The full-length receptor is 321 amino acids (aa) in length and contains a 274 aa extracellular region, a 26 aa transmembrane segment, and a 21 aa cytoplasmic domain. The extracellular region contains a C-type lectin domain and a connecting stalk with coiled-coil topography (3, 11). The lectin domain binds both protein and carbohydrate in an apparently Ca++ independent manner (11). The coiled-coil region contributes to oligomerization (11, 12). The lectin domain in human CD23 (aa 162 - 284) is 64%, 62% and 68% aa identical to the lectin domains in mouse, rat and bovine CD23, respectively. In the cytoplasmic region, two FC isoforms exist which arise from alternate start sites (6, 12). The “a” (or long) isoform begins with the sequence MEEGQYS and is constitutively expressed by B cells. It is believed to participate in IgE-mediated endocytosis (13). The “b” (or short) isoform begins with MNPPSQ and is induced on a wide variety of cell types by IL-4 (6). Fcb reportedly contributes to IgE-mediated phagocytosis (13). Fcb expressing cells include eosinophils, monocytes, visceral smooth muscle and intestinal epithelium (6, 14, 15). At least four soluble forms of CD23 are known to exist. They range in molecular weight from 25 kDa to 37 kDa, with the 25 kDa form predominating in sera (16). Soluble CD23 (sFc) is generated by metalloprotease (ADAM8; ADAM15; ADAM28) and cysteine-protease activity (16 - 18). Cleavage usually occurs between aa 150 - 160 (7, 8). It is unclear if sequential metalloprotease-cysteine protease activity is necessary for the generation of all soluble forms. Both soluble and membrane-bound CD23 show bioactivity. On B cells, sCD23 induces IgE secretion by binding CD21. Conversely, secreted IgE will, in turn, bind B cell membrane CD23, rendering it unavailable for cleavage, and thus shutting down IgE production (11).

  1. Kijimoto-Ochiai, S. (2002) Cell. Mol. Life Sci. 59:648.
  2. Heyman, B. (2000) Annu. Rev. Immunol. 18:709.
  3. Bajorath, J. and A. Aruffo (1996) Protein Sci. 5:240.
  4. Drickamer, K. (1993) Curr. Opin. Struct. Biol. 3:393.
  5. Drickamer, K. (1999) Curr. Opin. Struct. Biol. 9:585.
  6. Yokota, A. et al. (1988) Cell 55:611.
  7. Ludin, C. et al. (1987) EMBO J. 6:109.
  8. Ikuta, K. et al. (1987) Proc. Natl. Acad. Sci. USA 84:819.
  9. Kikutani, H. et al. (1986) Cell 47:657.
  10. Letellier, M. et al. (1988) J. Immunol. 141:2374.
  11. Hibbert, R.G. et al. (2005) J. Exp. Med. 202:751.
  12. Beavuil, A.J. et al. (1992) Proc. Natl. Acad. Sci. USA 89:753.
  13. Yokota, A. et al. (1992) Proc. Natl. Acad. Sci. USA 89:5030.
  14. Belleau, J.T. et al. (2005) Clin. Mol. Allergy 3:6.
  15. Tu, Y. et al. (2005) Gastroenterology 129:928.
  16. Marolewski, A.E. et al. (1998) Biochem. J. 333:573.
  17. Fourie, A.M. et al. (2003) J. Biol. Chem. 278:30469.
  18. Karagiannis, S.N. et al. (2001) Immunology 103:319.

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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Publications for CD23/Fc epsilon RII Antibody (BAF123)(1)

We have publications tested in 1 confirmed species: Mouse.

We have publications tested in 1 application: Flow Cytometry.


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Biotin BAF123

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