Marker: 
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Cells: 
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Description: 
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CD2 
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T cells 
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adhesion molecule, present on most mature T cells, often lost  
in transformation 
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CD3 
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T cells 
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transduces activation signal from antigen receptor 
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CD4 
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helper T cells 
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binds to class II MHC 
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CD7 
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CD8 
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suppressor T cells 
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binds to class I MHC 
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CD 25 
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activated T cells 
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IL-2 receptor (Tac), induced by HTLV-1) 
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CD30 
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activated T cells 
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Ki-1 marker, found in anaplastic T-cell lymphomas, LyP 
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CD45 
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leukocyte common 
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isoforms of CD45 appear with T-cell activation  
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CD45RO 
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memory cells 
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irreversibly formed after T-cell activation  
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CLA-1 
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skin associated lymphocytes 
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homing receptor that bind ELAM-1 
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TCR 
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T cells 
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two varieties: alpha-beta and gamma-delta (these are proteins that bind specific antigens) 
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V-beta 
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T cells 
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variable region specific antibodies (approx. 45 different regions) 
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