FIG. 2.

Products from reverse transcription-PCR amplification of IDO and GAPDH mRNAs visualized on a 1% agarose gel. Lanes 1 to 4 correspond to the amplification products obtained from RNA isolated from HeLa cells grown in medium alone, HeLa cells treated with 100 U of IFN-γ/ml, BeWo cells in medium alone, and BeWo cells treated with 100 U of IFN-γ/ml, respectively. Lane 5 contains a 1-kb molecular size marker.