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Phenotype of IDO-expressing transfectants. (A) Flasks of RAW cell clones stained with trypan blue and photographed under normal light. Flasks are arranged in order of increasing IDO expression and show foci visible to the naked eye. V; Vector only control. (B) Vector-only transfected RAW cells. (C) Clone 11 IDO-expressing RAW cells. (D) Vector-only transfected MC57 cells. (E) IDO-expressing MC57 cell clone. Bar = 250 μm.
