CD45R (B220) Monoclonal Antibody (HIS24), eBioscience™, Invitrogen™

Description

• Description: The HIS24 monoclonal antibody reacts with an isoform of CD45 expressed by rat B cells
• The antigen recognized by HIS24 is found on B cells from the early stage of B cell development in the bone marrow to mature peripheral B cells, but not on plasma cells
• HIS24 recognizes a 205 kDa protein by immunoblotting
• CD45, also known as Leukocyte Common Antigen (LCA), has tyrosine phosphatase enzymatic activity in its cytoplasmic portion and plays an important role in activation of lymphocytes
• Applications Reported: The HIS24 antibody has been reported for use in flow cytometric analysis, immunoblotting (WB), and immunohistochemical staining
• Applications Tested: This HIS24 antibody has been tested by flow cytometric analysis of rat splenocytes
• This can be used at less than or equal to 0.5 μg per test
• A test is defined as the amount (μg) of antibody that will stain a cell sample in a final volume of 100 μL
• Cell number should be determined empirically but can range from 10^5 to 10^8 cells/test
• It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest
• Purity: Greater than 90%, as determined by SDS-PAGE
• Aggregation: Less than 10%, as determined by HPLC
• Filtration: 0.2 μm post-manufacturing filtered
• CD45R (PTPRC) is a member of the protein tyrosine phosphatase (PTP) family
• PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation
• CD45 contains an extracellular domain, a single transmembrane segment and two tandem intracytoplasmic catalytic domains
• CD45 is specifically expressed in hematopoietic cells and has been shown to be an essential regulator of T- and B-cell antigen receptor signaling
• CD45 glycoprotein is crucial in lymphocyte development and antigen signaling, serving as an important regulator of Src-family kinases
• CD45 protein exists in multiple isoforms as a result of alternative splicing, and these isoforms differ in their extracellular domains, but share identical transmembrane and cytoplasmic domains
• Further, these CD45 isoforms differ in their ability to translocate into the glycosphingolipid-enriched membrane domains and their expression depends on cell type and physiological state of the cell
• In addition to its role in immunoreceptor signaling, CD45 is important in promoting cell survival by modulating integrin-mediated signal transduction pathway and is also involved in DNA fragmentation during apoptosis
• CD45RA is an isoform of the CD45 complex and has restricted expression between different subtypes of lymphoid cells
• Diseases associated with CD45 dysfunction include Severe Combined Immunodeficiency (T-cell negative, B-Cell Negative) and Hepatitis C.