Evi1 and Prdm16 are frequent targets of MSCV integration in immortalized immature myeloid progenitor cell lines.Evi1 MSCV integrations (top panel) and Prdm16 integrations (bottom panel). Yellow boxes depict exons, while red triangles indicate the location and orientation of integrated MSCV proviruses. Cell line numbers are listed above the red triangles.