B220, CD 45, CD45, cd45 antigen, ec3.1.3.48, CD45R, GP180, GP180, GP 180, L CA, LCA, L-CA, Leukocyte common antigen, LY5, Protein tyrosine phosphatase receptor type C, Protein tyrosine phosphatase receptor type c polypeptide, protein tyrosine phosphatase, receptor type, C, Receptor-type tyrosine-protein phosphatase C, PTPRC, PTPRC_HUMAN, SCID due to PTPRC deficiency, T200, T200 glycoprotein, T200 leukocyte common antigen, Human homolog of severe combined immunodeficiency due to PTPRC deficiency.
CD45RO is a single chain transmembraneous glycoprotein which represents the low molecular weight isoform of the Leucocyte Common Antigen (LCA). It is expressed on most thymocytes, about 45% of peripheral blood T cells, virtually all T cells in skin reactive infiltrates, and the majority of T cell malignancies. It is also found on a subset of B cells and on exceptional B cell lymphomas.CD45 is a family of single chain transmembraneous glycoproteins consisting of at least four isoforms (220, 205, 190, 180 kDa) which share a common large intracellular domain. Their extracellular domains are heavily glycosylated. The different isoforms are produced by alternative messenger RNA splicing of three exons of a single gene on chromosome 1. CD45 is expressed on cells of the human hematopoietic lineage (including hematopoietic stem cells) with the exception of mature red cells. It is not detected on differentiated cells of other tissues. It is likely that CD45 plays an important role in signal transduction, inhibition or upregulation of various immunological functions. recognising a common epitope on all of the isoforms are termed CD45 whilst those recognising only individual isoforms are termed CD45RA or CD45RO etc.
