CST, 55618S, CD45RO (UCHL1) Mouse Monoclonal Antibody

Monoclonal Antibody for studying CD45. Validated for Immunohistochemistry (Paraffin). Available in 2 sizes. Highly specific and rigorously validated in-house, CD45RO (UCHL1) Mouse Monoclonal Antibody (CST #55618) is ready to ship. Product Usage Information Immunohistochemistry (Paraffin): 1:400 Storage Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at -20°C. Do not aliquot the antibody. For a carrier free (BSA and azide free) version of this product see product # 36282 . Protocol Available protocols: Immunohistochemistry (Paraffin) Specificity / Sensitivity CD45RO (UCHL1) Mouse Monoclonal Antibody recognizes endogenous levels of total CD45RO protein. Species Reactivity: Human Source / Purification Monoclonal antibody is produced by immunizing animals with the IL-2-dependent T cell line, CA1 (5). Background The protein phosphatase (PTP) receptor CD45 is a type I transmembrane protein comprised of a pair of intracellular tyrosine phosphatase domains and a variable extracellular domain generated by alternative splicing (1). The catalytic activity of CD45 is a function of the first phosphatase domain (D1) while the second phosphatase domain (D2) may interact with and stabilize the first domain, or recruit/bind substrates (2,3). CD45 interacts directly with antigen receptor complex proteins or activates Src family kinases involved in the regulation of T- and B-cell antigen receptor signaling (1). Specifically, CD45 dephosphorylates Src-family kinases Lck and Fyn at their conserved negative regulatory carboxy-terminal tyrosine residues and upregulates kinase activity. Conversely, studies indicate that CD45 can also inhibit Lck and Fyn by dephosphorylating their positive regulatory autophosphorylation site. CD45 appears to be both a positive and a negative regulator that conducts signals depending on specific stimuli and cell type (1). Human leukocytes including lymphocytes, eosinophils, monocytes, basophils, and neutrophils express CD45, while erythrocytes and platelets are negative for CD45 expression (4). Several isoforms of CD45 are generated through alternative splicing in a cell type-specific and activation state-specific manner. Memory T cells are positive for CD45RO, while naive T cells are negative for CD45RO (5). Alternate Names B220; CD45; CD45 antigen; CD45R; CD45RA; CD45RO; glycoprotein; GP180; L-CA; LCA; Leukocyte common antigen; leukocyte-common antigen; LY5; protein tyrosine phosphatase receptor type C; protein tyrosine phosphatase, receptor type, C; protein tyrosine phosphatase, receptor type, c polypeptide; PTPRC; Receptor-type tyrosine-protein phosphatase C; T200; T200 glycoprotein; T200 leukocyte common antigen Specification REACTIVITY: H SENSITIVITY: Endogenous Source/Isotype: Mouse IgG2a