To reveal the molecular details of the anti-apoptotic effect of IFNγ on CML stem/progenitor cells, we analyzed the effect of IFNγ treatment on the transcriptome of imatinib-treated primary human CD34+ CML stem/progenitor cells with an Affymetrix whole transcript array (data not shown), followed by validation with real time reverse transcription PCR. The gene discussed is IFNG; the disease is chronic myelogenous leukemia, BCR-ABL1 positive.