This effect required surface expression of the CD45 PTPase and was not observed in CD45-deficient variants of Jurkat cells .
this effect required surface expression of the cd45 ptpase and was not observed in cd45-deficient variants of jurkat cells .
O O O O O O O B-protein_molecule I-protein_molecule O O O O O B-cell_line I-cell_line O B-cell_line I-cell_line O