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Expression of human thrombomodulin (TBM) by COS-7 cells stably transfected with 4-gene construct #5 (CMV/Hygro-TBM-CTLA4Ig-CD39) after selection with neomycin (middle panel) or hygromycin (bottom panel). Control vectortransfected cells selected with neomycin are shown in the top panel. A representative example of two separate experiments is shown.
