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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Molecular cloning of two CD7 (T-cell leukemia antigen) cDNAs by a COS cell expression system.

The human CD7 antigen (gp40) is a cell surface glycoprotein found on thymocytes and mature T-cells. It is one of the earliest antigens to appear on cells of the T-lymphocyte lineage, and the most reliable clinical marker of T-cell acute lymphocytic leukemia. This report describes the isolation and nucleotide sequence of a full length CD7 cDNA, and of a cDNA for an unusual intron-bearing precursor. The DNA sequence of the clone predicts a highly glycosylated membrane protein with homology to members of the immunoglobulin superfamily, and no relationship to known oncogenes. Over-expression of CD7 RNA was observed in only one T-cell tumor line, and genomic DNA rearrangement was not observed in any lines. Prompted by a recent suggestion that CD7 plays a role in IgM binding, COS cells expressing CD7 were tested and found not to bind IgM or IgM immune complexes.[1]

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