Additional file 4.

The number of tags supporting transcription initiation correlates with its expression. The logarithm of the number of reads supporting a given transcriptional initiation region (TIR, x-axis) and the expression (log(FPKM), y-axis) of its associated transcripts are significantly correlated (Pearson correlation R = 0.44, P < 2 × 10-16).

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Marques et al. Genome Biology 2013 14:R131   doi:10.1186/gb-2013-14-11-r131