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  • 05-1413 - Anti-CD45RA Antibody, Clone MEM 56

05-1413 Sigma-Aldrich

Anti-CD45RA Antibody, Clone MEM 56

Anti-CD45RA Antibody, Clone MEM 56 detects level of CD45RA & has been published & validated for use in FC, IF, IH(P), IP & WB.

Synonym: CD45 antigen, Leukocyte common antigen precursor, SCID due to PTPRC deficiency, T200 glycoprotein, T200 leukocyte common antigen, Human homolog of severe combined immunodeficiency due to PTPRC deficiency, Leukocyte-common antigen, Protein tyrosine phosph

  •  eCl@ss 32160702

  •  NACRES NA.41



Related Categories Antibodies, Primary Antibodies More...
packaging   100 µg (05-1413)
application(s)   flow cytometry: suitable
  immunofluorescence: suitable
  immunohistochemistry: suitable (paraffin)
  immunoprecipitation (IP): suitable
  western blot: suitable
biological source   mouse
clone   MEM 56, monoclonal
isotype   IgG2b
shipped in   wet ice
species reactivity   rat, human, mouse,
gene symbol   PTPRC(5788)
format   Purified
molecular weight   ~220 kDa
clone   Monoclonal Antibody
concentration   Please refer to the Certificate of Analysis for the lot-specific concentration.
Species Reactivity Notes   Mouse. Expected to react with human and rat based on sequence homology. .
gene symbol   B220
Quality Assurance   Routinely evaluated by Western Blot on RAW 264 lysates.

Western Blot Analysis: 1:500 dilution of this lot detected CD45RA on 10 μg of RAW 264



Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Target description

~220 kDa

Analysis Note

RAW264 Cell Lysate


Immunofluorescence: Identification of CD4+ suppressor/inducer cells, by indirect immunofluorescence staining.

Immunoprecipitation: A previous lot of this antibody detected 220 kDa molecular weight component of the leucocyte common antigen complex in immunoprecipitation.

Flow Cytometry: Purification or depletion of CD4+ suppressor/inducer cells by cell sorting or the panning techniques was performed on a previous lot.

Immunohistochemistry(paraffin): Representative testing from a previous lot.
Identification of CD45R+ lymphocytes in cryostat sections of frozen tissue and in formalin fixed wax embedded tissue.

Optimal Staining of CD45RA Monoclonal Antibody: Tonsil

Research Category

Research Sub Category
Immunological Signaling

General description

CD45 is a receptor-tyrosine phosphatase required for antigen-induced signaling in T-cells and B-cells; its substrates are unknown. Interestingly, it associates with several Src-family tyrosine kinases, which are inhibited by tyrosine phosphorylation in their c-termini, suggesting a mechanism for signaling by CD45.

Other Notes

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.


This antibody recognizes the 220 kDa molecular weight component of the leucocyte common antigen complex expressed on some CD4+ T lymphocytes, B lymphocytes and CD8+ lymphocytes. The CD45R+/CD4+ lymphocytes functionally exert suppressor/inducer activity in in vitro assay systems.
Antigen distribution:
B-cells (lg+) > 95%
T-cells (E+) 70 + 10%
Peripheral blood lymphocytes 68 + 8%
T-cells (CD4+) 50 + 10%
Monocytes 50 + 20%
Thymocytes < 5%
Granulocytes < 1%

Physical form

Format: Purified

Purified mouse monoclonal IgG2b in phosphate buffered saline containing 10 mM sodium azide and 1 mg/mL bovine serum albumin.
We recommend that each laboratory determine an optimum working titre for use in its particular application.


Storage and Stability

For use within 1 month of date of purchase store at 2-8°C, for long term storage aliquot antibody into small volumes and store at -20°C for up to 1 year from date of receipt.
Handling Recommendations: Upon first thaw, and prior to removing the cap, centrifuge the vial and gently mix the solution. Aliquot into microcentrifuge tubes and store at -20°C. Avoid repeated freeze/thaw cycles, which may damage IgG and affect product performance.

Safety & Documentation

Safety Information

Safety Information for this product is unavailable at this time.


Certificate of Analysis

Protocols & Articles
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