Examples on chromosomal aberrations found by the multiplex RT-PCR. The loading order and DNA molecular weight marker are as in Fig 1. The band specific for the translocation is indicated by an arrowhead beside the band. The dots indicate activation of HOX11 (lane 4) or EVI1 (lane 7). Because HOX11 and EVI1 represent activation of native gene products and not of chimerical products, these are not further discussed in this presentation. *Patient no. 335 was a chronic myeloid leukemia case not included in this study.