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

Thrombospondin II: partial cDNA sequence, chromosome location, and expression of a second member of the thrombospondin gene family in humans.

A novel form of human thrombospondin was identified during the screening of a human fibroblast cDNA library. We report the cDNA sequence for 1.8 kb of the 3' end of the cDNA, plus an additional 937 bp of 3'-untranslated sequence. The translated sequence reveals a high degree of similarity to thrombospondin I. The homology ranges from 56 to 80% for different regions within the two proteins. The repeating segments of amino acid sequence identified in thrombospondin I were found to be conserved in thrombospondin II. The new form of thrombospondin hybridizes to a 7.5-kb message by Northern analysis. The THBS2 gene is located at the distal long arm of chromosome 6 at 6q27. The gene is transcribed in fibroblasts, smooth muscle cells, and an osteosarcoma cell line, at levels somewhat lower than that of thrombospondin I. Umbilical vein endothelial cells do not transcribe thrombospondin II under the conditions of this study. These findings suggest that previous studies of thrombospondin function need to be reassessed to identify the functions specific to each molecule.[1]

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