Mouse CD45 Alexa Fluor® 405-conjugated Antibody

Catalog # Availability Size / Price Qty
FAB114V-025
Detection of CD45 in Mouse Bone Marrow Cells by Flow Cytometry.
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Mouse CD45 Alexa Fluor® 405-conjugated Antibody Summary

Species Reactivity
Mouse
Specificity
Detects mouse CD45. Recognizes all CD45 isoforms as well as the known mouse CD45 alloantigens (CD45-1/Ly 5a and CD45-2/Ly 5b) (15).
Source
Monoclonal Rat IgG2B Clone # 30-F11
Purification
Protein A or G purified from hybridoma culture supernatant
Immunogen
Mouse thymus and spleen cells
Formulation
Supplied in a saline solution containing BSA and Sodium Azide.
Label
Alexa Fluor 405

Applications

Recommended Concentration
Sample
Flow Cytometry
5 µL/106 cells
See below

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.

Data Example

Flow Cytometry Detection of CD45 in Mouse Bone Marrow Cells by Flow Cytometry. View Larger

Detection of CD45 in Mouse Bone Marrow Cells by Flow Cytometry. Mouse bone marrow cells were stained with Rat Anti-Mouse TER‑119 APC‑conjugated Monoclonal Antibody (Catalog # FAB1125A) and either (A) Rat Anti-Mouse CD45 Alexa Fluor® 405‑conjugated Monoclonal Antibody (Catalog # FAB114V) or (B) Rat IgG2B Alexa Fluor 405 Isotype Control (Catalog # IC013V). View our protocol for Staining Membrane-associated Proteins.

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Preparation and Storage

Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Protect from light. Do not freeze.
  • 12 months from date of receipt, 2 to 8 °C as supplied.

Background: CD45

CD45, previously called LCA (Leukocyte Common Antigen), T200, or Ly5 in mouse, is member C of the class 1 (receptor-like) Protein Tyrosine Phosphatase family (PTPRC) (1, 2). It is a variably glycosylated 180-220 kDa transmembrane protein that is abundantly expressed on all nucleated cells of hematopoietic origin (1-3). CD45 has several isoforms, expressed according to cell type, developmental stage and antigenic exposure (1-5). The longest form, CD45RABC (called B220 in mouse), is expressed on B lymphocytes (5). The mouse CD45RABC cDNA encodes 1291 amino acids (aa), including a 23 aa signal sequence, a 541 aa extracellular domain containing the splicing region, a cysteine-rich region and two fibronectin type III domains, a 22 aa transmembrane sequence, and a 705 aa cytoplasmic domain that contains two phosphatase domains, D1 and D2. Only D1 has phosphatase activity. CD45R0 is the shortest form, lacking exons 4, 5 and 6 which encode aa 30-169. It is expressed on memory cells, while intermediate sizes are expressed on other T cells (3, 4, 6). CD45 has been best studied in T cells, where it determines T cell receptor signaling thresholds (3, 6-8). CD45 is moved into or out of the immunological synapse (IS) membrane microdomain depending on the relative influence of interaction with the extracellular galectin lattice or the intracellular actin cytoskeleton (9, 10). Galectin interaction can be fine-tuned by varying usage of the heavily O-glycosylated spliced regions and sialylation of N-linked carbohydrates (4, 9). Within the IS, CD45 dephosphorylates and negatively regulates the src family kinase, LCK (8-10). In other leukocytes, CD45 influences differentiation and links immunoreceptor signaling with cytokine secretion and cell survival, partially overlapping in function with DEP-1/CD148 (11-14). CD45 deletion causes severe immunodeficiency, while point mutations may be associated with autoimmune disorders (6, 7).

References
  1. Anderson, J.N. et al. (2004) FASEB J. 18:8.
  2. Streuli, M. et al. (1987) J. Exp. Med. 166:1548.
  3. Hermiston, M.L. et al. (2003) Annu. Rev. Immunol. 21:107.
  4. Earl, L.A. and L.G. Baum (2008) Immunol. Cell Biol. 86:608.
  5. Ralph, S.J. et al. (1987) EMBO J. 6:1251.
  6. Falahti, R. and D. Leitenberg (2008) J. Immunol. 181:6082.
  7. Tchilian, E.Z. and P.C.L. Beverley (2006) Trends Immunol. 27:146.
  8. McNiell, L. et al. (2007) Immunity 27:425.
  9. Chen, I-J. et al. (2007) J. Biol. Chem. 282:35361.
  10. Freiberg, B.A. et al. (2002) Nat. Immunol. 3:911.
  11. Zhu, J.W. et al. (2008) Immunity 28:183.
  12. Huntington, N.D. et al. (2006) Nat. Immunol. 7:190.
  13. Hesslein, D.G. et al. (2006) Proc. Natl. Acad. Sci. USA 103:7012.
  14. Cross, J.L. et al. (2008) J. Immunol. 180:8020.
  15. Ledbetter, J.A. and L.A. Herzenberg (1979) Immunol. Rev. 47:63.
Long Name
Cluster of Differentiation 45
Entrez Gene IDs
5788 (Human); 19264 (Mouse); 490255 (Canine); 100061950 (Equine)
Alternate Names
B220; CD45 antigen; CD45; CD45R; EC 3.1.3.48; LCA; L-CA; LY5; protein tyrosine phosphatase, receptor type, C; PTPRC; receptor-type tyrosine-protein phosphatase C; T200 Glycoprotein; T200 leukocyte common antigen; T200receptor type, c polypeptide

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