1. 
   CD45
   <immunology> High-molecular weight glycoproteins uniquely expressed on the surface of all leukocytes and their haemopoietic progenitors. The CD45 family consists of multiple members that are all products of a single gene. Cd45 expression is necessary for signalling through the T-cell receptor....
   Found op http://www.mondofacto.com/facts/dictionary?CD45
   
   
2. 
   CD45
   Type: Term Definitions: 1. a type I transmembrane protein present on all hemopoietic cells (except erythrocytes) that assists in cell activation; expressed in lymphomas, B-cell chronic lymphocytic leukemia, hairy cell leukemia, and acute nonlymphocytic leukemia.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=18373
   
   

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