ABCG2 mRNA expression levels in adult AML blast cell populations.

The ABCG2 mRNA levels of 40 AML samples were measured by real-time RT-PCR and normalized for beta-actin expression. As reference points, the levels associated with clone 6.2, clone 3.3, and normal human BM and PB also are shown. Error bars represent the SD for triplicate measurements. Percentage levels for mRNA measurements (y-axis) represent the percentage of ABCG2 mRNA signal, normalized to beta-actin mRNA, relative to the measurement obtained for clone 3.3.