RBM6 and neoplasm: As shown in Table 4, however, RBM5 mRNA expression levels, in breast tissue, were found to be higher in chimeric positive tumours than chimeric negative tumours, further suggesting that the process of transcription-induced chimerism at this locus is not responsible for repressing expression of either of the two putative tumour suppressor genes RBM6 and RBM5. It is therefore hypothesized that the three novel RBM6-RBM5 transcription-induced chimeras are functional non-coding RNAs, whose role is not one of RBM6 and/or RBM5 transcription regulation.