CD45, also referred to as CD45R and PTPRC (Protein tyrosine phosphatase receptor type C), has been identified as a transmembrane glycoprotein, broadly expressed among hematopoietic cells. Along with other members of the PTP family, it regulates a number of cellular processes including cell differentiation, growth and mitotic cycle, and is an essential regulator of B- and T-cell antigen receptor-mediated activation.

Multiple isoforms of CD45 are distributed throughout the immune system and arise due to alternative splicing of exons located in the N-terminus. CD45RA contains the A exon and is a naive T-cell marker which may help prevent autoimmune disease. CD45RB contains B and stains most leukemias and lymphomas. CD45RC contains C and stains thymocytes, monocytes and dendritic cells. CD45RO doesn't contain A, B or C and is a marker of activated T-cells that can be used to classify and diagnose and classify lymphomas. This antibody will bind to all CD45 isoforms. The variation in these isoforms is localized to the extracellular domain, with the intracellular domain being conserved. Antibody to CD45 is useful in differential diagnosis of lymphoid tumors from non-hematopoietic undifferentiated neoplasms.

Flow Cytometry: 0,5-1 µg/million cells Immunofluorescence: 0,5 - 1 µg/ml Immunohistology (FFPE): 0,5-1,0 µg/ml for 30 minutes at RT (1) Prediluted format: incubate for 30 min at RT (2) Due to variation in protocol and secondary antibody used, the anti-CD45 antibody may need to be titered for optimal performance.

1. FFPE staining requires boiling tissue sections in 10 mM citrate buffer, pH 6,0, for 10 - 20 min followed by cooling at RT for 20 minutes.
2. The prediluted format is supplied in a dropper bottle and is optimised for use in IHC. After epitope retrieval step (if required), drip mAb solution onto the tissue section and incubate at RT for 30 min.

Type: Primary
Antigen: PTPRC
Clonality: Monoclonal
Clone: SPM570
Conjugation: Unconjugated
Epitope:
Host: Mouse
Isotype: IgG1, kappa
Reactivity: Human